Aronia melanocarpa / Aronia

Black chokeberry (also referred to as aronia or aroniaberry in some English-speaking countries) is a perennial shrub with lustrous green leaves that is native to North America and Canada.1-3 It is found predominately in the rangeland that extends from the northeastern part of North America and the Great Lakes area to the mountain bogs of the upper parts of the Appalachians in the south.2,4 The shrub can grow to a height of two to three meters (three to nine feet) with small, white flowers appearing from May through June.1 The pomes (false fruits with a core containing the seeds enclosed in a fleshy part that develops from the receptacle of a flower and not from the ovary) grow in clusters of eight to 14 and are purplish-black and six millimeters (1/4 inch) in diameter when ripe.1-3 The fruit usually is harvested between August and September.1 Although black chokeberry is native to the United States and Canada, it also is cultivated in Eastern European countries and Germany, where it was introduced in the early 1900s.1

HISTORY AND CULTURAL SIGNIFICANCE
Black chokeberry is one of 16 species in the genus Aronia in the rose family distributed in North America and Eastern Asia. In 1803, the French botanist André Michaux had initially described this species as Mespilus arbutifolia var. melanocarpa.5
Historically, black chokeberry was used by the North American Forest Potawatomi tribe.2 They called the fruits nîki’mînûn or sakwako’mînûn and used them to make a tea for the treatment of colds.2,6 Both the Potawatomi and Abnaki tribes used the fruit for food.7 The berries were used in the preparation of pemmican, a nutritious and long-lasting foodstuff prepared from animal fat, dried powdered meat, and sometimes fruit.2 According to an ethnobotanical account from 1933, the Forest Potawatomi reported that “they eat the berries from this plant but they are entirely too bitter to suit the white man.”6 Among North American settlers, both the berries and the bark were used as an astringent.2

Black chokeberry is one of the most frequently cultivated Aronia species, in addition to red chokeberry (A. arbutifolia; also a native of North America), the tetraploid large-fruited black chokeberry (A. x mitschurinii; developed in Russia), the interspecific hybrid purple chokeberry (A. x prunifolia), and the intergenus hybrids of black chokeberry with whitebeam (Sorbus aria, Rosaceae) = x Sorbaronia dippelii and with American mountain ash (S. americana) = x Sorbaronia sorbifolia.5
Commercial cultivation of black chokeberry is a relatively recent development.5 Although the plant is a North American species, Ivan Mitschurin began breeding experiments in Russia in 1910 with the goal of developing a sweet-tasting rowan berry by crossing black chokeberry with Sorbus or Mespilus species. His work resulted in two cultivars, ‘Likernaja’ and ‘Desertnaja Michurina.’ In 1982, Mitschurin’s varieties were named as a new hybrid species A. x mitschurinii.5

After World War II, black chokeberry cultivation expanded in Europe and Russia.5 Starting in 1946, large-scale black chokeberry cultivation was steadily introduced into republics of the former Soviet Union, mainly Belarus, Moldova, Russia (Siberian Federal District) and Ukraine. Black chokeberry was first introduced to Japan in 1976 from the former Soviet Union.2 By the 1980s, it was introduced for cultivation in former Soviet Bloc countries including Bulgaria, Czechoslovakia, East Germany, Poland, and Slovenia as well as in Scandinavian countries, including Denmark and Finland. Poland has become the main supplier of chokeberry to Germany, although there has been black chokeberry cultivation in Saxony (of former East Germany) since 1976.5

In Russia, where it has been documented as a functional food since the 1940s, and in Eastern European countries, black chokeberry has been used for both high blood pressure and cholesterol.2,8 Historically, it has been used topically as a remedy for hemorrhoids.2 Additionally, it has been utilized to maintain a healthy urinary tract, fight bacteria and viruses, strengthen memory, aid digestion, and to treat diabetes and arthritis.8 In 1996, Jan Mills, president and CEO of Artemis International Inc. (Fort Wayne, IN), obtained the main commercial cultivars from Polish agricultural schools and brought them back to the United States, where they were placed in various research stations for the purpose of optimizing techniques for commercial production towards the establishment of a viable new economic crop for American orchardists.

In addition to its use in the canning industry for the manufacture of compotes, confitures, fruit jellies, and marmalades; chokeberry juice is used in the food and beverage industry as an additive to augment coloration of other fruit juices and to adjust or enhance flavor (e.g., as a component of fruit-juice cocktails in combination with apple [Malus pumila, Rosaceae], black currant [Ribes nigrum, Grossulariaceae], European gooseberry [Ribes uva-crispa, Grossulariaceae], pear [Pyrus communis, Rosaceae], and/or garden rhubarb [Rheum rhabarbarum, Polygonaceae]).5 The fresh-pressed juice is a valuable raw material for the manufacture of alcoholic sparkling wines, dessert wines, and liqueurs. In Europe, there are non-alcoholic, functional, ready-to-drink  beverages like green tea (Camellia sinensis, Theaceae) with black chokeberry, raspberry (Rubus idaeus, Rosaceae) and stinging nettle (Urtica dioica, Urticaceae) leaf juice, as well as innovative, soft spirituous liquors such as Vodka-Aronia. In the dairy processing industry, there are black chokeberry yogurts, cream desserts, and ice creams and sorbets, which are especially popular due to color intensity and unusual taste characteristics. In the confectionary and baking industries, the fruit purée, juice, or powdered fruit forms are used in the production of praline fillings, cake fillings, fruit bars, cereals (dried fruit and candied fruit), and gummy bears. The pomace (the solid remains of the fruit after the juice has been pressed) is suitable for the extraction of dyestuff (dyestuff content: four to 10 g/kg) and extracts of the pomace are used as food color pigment components of foods and pharmaceutical products. The pomace extracts can contain about 5.8% anthocyanins, 6.8 ± 0.95% organic acids (pH value: 3.5), and 0.3% catechins and leuco-anthocyanins.5

The chokeberry bush is used ornamentally in the United States.9 In England, black chokeberry received the Royal Horticultural Society’s Award of Merit in 1972, primarily because it has three seasons of interest (white flowers in the spring, green foliage in the summer, and fruits in the late summer and autumn).9

CURRENT AUTHORIZED USES IN COSMETICS, FOODS, AND MEDICINES
A primary use of black chokeberry juice is reportedly as an extender to other juices (Bush M, personal communication to A. Lindstrom, January 22, 2014). The fresh frozen fruit is used for bakery and smoothie applications while the concentrate/powder/extract is applied as a nutraceutical component of functional beverages and dietary supplement products. The United States Department of Agriculture (USDA) permits the use of nonorganically-produced chokeberry (aronia) juice color pigment as an exempted ingredient in processed products that are labeled as certified organic, but only when organic chokeberry juice color pigment is not commercially available.10 Additionally, while color additives for use in food generally require approval and certification by the Food and Drug Administration (FDA), fruit juice including black chokeberry juice is classified as a color additive that is exempt from certification.11

In the food ingredients fraud database of the Food Chemicals Codex, sorbitol-containing fruit juices such as aronia juice, as well as anthocyanins obtained from aronia, are listed as known adulterants of pomegranate (Punica granatum, Lythraceae) fruit juice.12

For the purpose of establishing pesticide tolerance limits, “Aronia berry” (Aronia spp.) is listed as a commodity in the Environmental Protection Agency (EPA) crop subgroup 13-07B (bushberry subgroup) of EPA crop group 13-07 (berry and small fruit crop group). EPA permits the application of, and therefore residues of, nine specific pesticide chemicals on black chokeberry: bifenthrin (residues up to 1.8 ppm [parts per million]), carbaryl (3.0 ppm), clopyralid (0.50 ppm), endothall (0.6 ppm), fluazinam (7.0 ppm), halosulfuron-methyl (0.05 ppm), methoxyfenozide (3.0 ppm), metolachlor (0.15 ppm), and novaluron (7.0 ppm).13

In Canada, black chokeberry (dried or fresh) is classified as a medicinal ingredient of licensed natural health products (NHPs) requiring pre-marketing authorization from the Natural Health Products Directorate (NHPD) and manufacture in compliance with NHP good manufacturing practices (GMPs). Several black chokeberry ingredients also are permitted for use as non-medicinal components of licensed NHPs for specific purposes (when used at non-therapeutic levels). For example, black chokeberry fruit extract (dry or liquid) and chokeberry flavor both are permitted for use as non-medicinal flavor enhancer ingredients of oral (e.g., juices and tablets) and topical (e.g., skin or lip balms) NHPs, while “Aronia melanocarpa fruit juice” is permitted for use as a non-medicinal skin-conditioning agent of topical NHPs.14

At the time of this writing there were four licensed NHPs containing black chokeberry as a medicinal ingredient. One of the four, a monopreparation containing 100 mg of dried extract per capsule, carries the NHPD-authorized use as a source of antioxidants. There were 18 licensed NHPs containing non-medicinal black chokeberry ingredients (extract or juice) and another 13 containing chokeberry flavor.15

In the European Union, there are registered Traditional Herbal Medicinal Products (THMPs) that contain black chokeberry concentrated juice as a component. As an example, PhytoPharm Klęka SA (Klęka, Poland) is the marketing authorization holder for a THMP called Bioaron C® syrup, which contains, per five ml dose, 1,920 mg extract of Aloe arborescens (Xanthorrhoeaceae) and 51 mg ascorbic acid (vitamin C) as the active ingredients with 1,170 mg of Aroniae succus (concentrated black chokeberry juice) listed as an excipient ingredient. Although it is authorized for marketing based on traditional use only, Bioaron C® has been the subject of clinical studies and was marketed as a food supplement product in some EU member states prior to implementation of the EU Directive on Traditional Herbal Medicinal Products in 2004.16,17

In 2011, the Panel on Dietetic Products, Nutrition and Allergies of the European Food Safety Authority (EFSA) provided a scientific opinion on a list of proposed health claims in relation to claimed effects of anthocyanidins and proanthocyanidins as food constituents occurring in black chokeberry and other fruits. The Panel concluded that a cause-and-effect relationship could not be established between the consumption of anthocyanidins and proanthocyanidins and claimed effects on “blood fat levels,” “carbohydrate metabolism and insulin sensitivity,” “gut health,” the “cardiovascular system,” and “eyes.”18

The EFSA Panel also evaluated the vascular health claim “maintenance of blood vessel wall strength” proposed for black chokeberry fruit food supplement products that contain an anthocyanin equivalent of nine to 15 g of fresh fruits per day (or 45 to 60 mg anthocyanins calculated as cyanidin-3-0-galactoside per day). The Panel concluded that the claimed vascular and vein health effects were not sufficiently defined, and therefore it was unclear how the suggested health outcomes could be assessed.19
There are presently two black chokeberry ingredients authorized for use in cosmetic products by European Commission Health and Consumers Directorate. Both the expressed juice and extract of the fruit are ingredients listed for skin-conditioning functions.20

MODERN RESEARCH
Black chokeberries have a higher content of phenolic constituents than most other black berries, including anthocyanins, proanthocyanidins, and phenolic acids.8 These constituents are thought to be responsible for positive outcomes in the few pilot studies that have been conducted on chokeberries. One in vitro trial on porcine coronary artery rings compared chokeberry, bilberry (Vaccinium myrtillus, Ericaceae), and elderberry (Sambucus nigra, Adoxaceae) to examine their potential vasoactive and vasoprotective properties in coronary arteries. The anthocyanin-rich extract from chokeberry (Artemis International, Ft. Wayne, IN) and bilberry (Artemis International), but not elderberry, “produced dose-dependent relaxation of coronary arteries, with the chokeberry extracts exhibiting the highest potency.”21

A small, uncontrolled clinical study in 2013 recruited 11 healthy Japanese women with high peripheral cold (thermal) constitution who were given three tablets daily containing 50 mg A. melanocarpa (ethanol/water extraction from frozen fruit under low temperature with nitrogen protection; anthocyanin content equivalent to 35% w/w, no further information provided).22 The subjects were instructed to take all three tablets daily with water after breakfast for four weeks. At the end of the study, the subjects’ body-surface temperature after 20 minutes of acclimatization in an air-conditioned room was significantly higher than at the beginning of the study. Psychological tests showed that factors related to cold were improved significantly and plasma noradrenaline concentration was elevated significantly (which would elevate thermogenesis) by black chokeberry intake. However, peripheral blood flow was not affected. The authors conclude that A. melanocarpa supplementation improves body temperature maintenance in healthy women with cold constitution, but that further research in placebo-controlled studies is needed to further investigate these findings.

In a 2012 clinical study, 25 patients with unmedicated hypercholesterolemia (high blood cholesterol) took 100 mg aronia extract (Aronox®; Agropharm; Tuszyn, Poland; approximately 25% anthocyanins [cyanidin glycosides], 9% phenolic acids [chlorogenic and neochlorogenic acids], and 50% monomeric [epicatechin] and oligomeric procyanidins) two times per day for two months.23 Blood samples were collected from the test group and a control group of 20 healthy individuals at the beginning of the study and at one and two months. Cholesterol decreased in the aronia group by 22% and lipid peroxidation decreased by 40%. No significant changes in other measured blood parameters occurred (thiol groups levels, total ATPase activity, or Na+/K+ ATPase activity).

Another study in 2012 investigated the effect of short-term supplementation with black chokeberry extract on blood clot formation, platelet aggregation (which leads to clot formation), and fibrinolysis (a process that prevents the growth of blood clots) in patients with metabolic syndrome (MetS).24 MetS patients (n=38) and 14 healthy volunteers were enlisted. MetS patients were given 100 mg A. melanocarpa extract (AM; 60 mg total polyphenols, including a minimum of 20 mg anthocyanins; most likely Aronox [brand name not given]) three times per day for two months. The control group received nothing. All participants started a low-fat diet three months prior to taking the chokeberry extract, were instructed not to modify their usual food intake or exercise, and were prohibited from ingesting black chokeberry products. At one and two month markers, body mass index and waist circumference were measured, urine analysis was performed, and blood was drawn prior to supplementation. Compliance was confirmed by tablet counts at one and two months. Blood was analyzed for total and differential blood cell count, blood sedimentation rate, alanine and aspartate aminotransferases, electrolytes, bilirubin, creatinine, and total proteins. Additional blood assays were performed for total serum cholesterol (TC), triglycerides (TG), HDL and LDL cholesterol (HDLc and LDLc), and fibrinogen levels. After one and two months of chokeberry supplementation, the AM group showed significant decreases in TC, LDLc, and TG; no changes in HDLc, BMI, or waist circumference occurred in the AM group. After one month of supplementation, the AM group experienced a statistically significant change in inhibition of platelet aggregation. However, these values returned to the pre-study levels after two months of supplementation. Potential for clot formation and fibrinolysis decreased significantly in the AM group after one month of supplementation, and the maximum of coagulation and fibrinolysis and lengths of these processes also were reduced. The authors point out that the study had some limitations, specifically the small number of subjects and the lack of a placebo group.

A 2010 study examined the effect of black chokeberries on blood pressure (BP), serum concentrations of lipids (TC, LDLc, HDLc, TG), endothelin-1 (ET-1), inflammatory mediators (C-reactive protein and fibrinogen), fasting glucose, and uric acid in patients with MetS.25 One group of participants included 25 MetS patients who had not responded to a three-month lifestyle modification. The second group included 22 healthy volunteers matched for age and gender. The treatment group was administered 100 mg aronia extract (Aronox [64.5% 3-O-cyanidin-galactoside, 28.9% 3-O-cyanidin-arabinoside, 4.2% 3-O-cyanidin-xyloside, and 2.4% 3-O-cyanidin-glucoside]) three times daily over a two-month period. Clinical examinations, measurements of weight, waist circumference, BP, urine examinations, 12-ECG, and blood sampling were performed before treatment began and after one and two months. Two months of aronia extract supplementation resulted in significant decreases in systolic and diastolic BP as well as in concentrations of TC, LDLc, TG, and ET-1, suggesting that aronia supplementation may benefit MetS patients with regard to atherosclerosis prevention.

One randomized, placebo-controlled human clinical study in 2005 found that rowers who supplemented their diets with chokeberry juice experienced less exercise-induced oxidative damage to red blood cells.26 Members of the Polish rowing team (19 males) comprised the study population. The treatment group (n=9) received 50 mL of chokeberry juice (23 mg/mL anthocyanin content, Europlant PhytoPharm Klęcka SA; Klęcka, Poland) three times daily for four weeks. The placebo group (n=10) received 50 mL juice three times daily that was identical in taste and appearance to the chokeberry juice. At the end of four weeks of supplementation, the rowers performed an incremental rowing ergometer exercise as a control. The following day they performed another incremental rowing exercise at which time blood samples were taken prior to starting, one minute after completion, and after a 24-hour recovery period. Concentrations of thiobarbituric acid reactive substances (TBARS) were assessed as a measure of red blood cell oxidative damage. TBARS concentrations were significantly lower in the chokeberry group than in the placebo group. The chokeberry group also experienced lower creatine kinase activity after the rowing exercise, suggesting a reduction in muscle damage associated with hard exercise.
One systematic review, published in 2010, evaluated 13 clinical trials performed between 2000 and 2009 — two of them covered in this article — and concluded that current evidence, while “poor by conventional standards,” is promising.8 The authors suggest that the results of the studies addressed in their review could provide a basis for the planning of a new generation of studies.

FUTURE OUTLOOK
Although there is a movement to reintroduce and popularize this native American species in North America, European countries are still the primary producers of black chokeberry ingredients and products.27 US production is but a fraction of total world output, albeit an increasing one. Jonathan D. Smith, PhD, president of Simply Incredible Foods (Port Edwards, WI), reported in 2013 that he identified 279 stock keeping units currently manufactured with Aronia ingredients in 33 countries in 39 different food categories, and in seven forms (concentrate, fresh juice, powder, puree, whole berry, extract, and pomace). The countries that produce the most products are Poland (101), Germany (24), the United States (24), Russia (19), Japan (12), and Canada (10). The most popular types of products containing chokeberry are teas, yogurts, nectars, juices, fruit drinks, jellies and chews, beverage concentrates, and medicated confectionaries.

Poland accounts for about 90 percent of world production.28 Black chokeberry production in Poland was 36,800 metric tons in 2009 and has increased steadily to an estimated 2013 production total of 50,000 metric tons. The larger 2013 crop, however, depressed the chokeberry market, causing some producers not to harvest due to the oversupply. Area under cultivation in Poland has increased from 5,200 hectares in 2009 to an estimated 6,000 hectares in 2013. Plantation acreage has remained fairly constant since 2010, mostly due to volatility in procurement prices. The Polish chokeberry sector is defined by the absence of a central producer organization and by heavy producer dependence on a just a few large processing companies as the main buyers.

In Germany, an average of 200 metric tons of black chokeberry is produced each year in the state of Saxony alone.5 Since 2009, cultivation also has been introduced to farmers in the state of Lower Saxony.

In the United States, demand for chokeberry ingredients with sustainable agriculture certification appears to be increasing based on the relatively high number of certified organic producers in the country.29 The USDA National Organic Program (NOP) database of certified organic producers shows 40 certified producers of aronia berry or chokeberry: 20 in Iowa, five in Washington, four in Wisconsin, four in Nebraska, and one each in Illinois, Kansas, Minnesota, Oregon, New York, and Vermont. There is one foreign organic producer situated in Bulgaria listed in the USDA database.

Possibly related to the number of certified organic black chokeberry producers in the United States are the newly established growers associations and some university agricultural research programs promoting black chokeberry plantations as a new economic crop source.30 The nonprofit Midwest Aronia Association was established in 2008 in Iowa with support from Iowa State University Extension and Outreach personnel, which provided the means to connect farmers interested in growing aronia. The association, with members in 12 states and one Canadian province, collectively represents about 200,000 aronia plantings.

More recently, the Mid-Atlantic Aronia Growers Association — a trade organization — was formed to further the interests of aronia growers in the Mid-Atlantic region. It also supports activities of a newly established National Aronia Council.31

A 2013 market potential study project of the Maine Agricultural Center proposed that black chokeberry offers good potential to enhance Maine’s economy, and it provided some indicative price information: “A mature aronia plant can yield 15-30 pounds of fruit. One pound of fresh frozen berries presently retails for $10 from internet suppliers. Other aronia products being marketed on internet sites include: dried fruit $8/8 oz; jelly $6/8 oz; juice concentrate $30/16 oz; and wine $14-21/bottle.”32

It is clear that small farmers in several states are participating in the development of a new American black chokeberry industry. If the products can be popularized in the United States as successfully as they have been elsewhere — particularly in Germany, Poland, and Russia — there may be a good chance for American farmers to reclaim this native plant and boost the local economies of rural farming communities. At the same time, agricultural programs in several countries are assessing the option of introducing and/or scaling up existing aronia plantations based on current market analysis showing that demand is increasing. The emerging domestic black chokeberry industry should address the growing demand for healthy foods grown in America and proponents of the local food movement.

REFERENCES
1. Kulling SE, Rawel HM. Chokeberry (Aronia melanocarpa) – a review on the characteristic components and potential health effects. Planta Med. 2008;74:1625-1634.
2. Kokotkiewicz A, Jaremicz Z, Luczkiewicz M. Aronia plants: a review of traditional use, biological activities, and perspectives for modern medicine. J Med Food. 2010;13:255-269.
3. Knudson M. Plant guide for black chokeberry (Photinia melanocarpa (Michx.) K.R. Robertson & Phipps). United States Department of Agriculture, Natural Resources Conservation Service. Bismarck Plant Materials Center: Bismarck, ND; 2009. Available at: http://plants.usda.gov/plantguide/pdf/pg_arme6.pdf. Accessed December 9, 2013.
4. Brand M. Aronia: Native shrubs with untapped potential. Arnoldia. 2010;67(3):14-25.
5. Walther E, Müller S. Aronia, Apfelbeere (Aronia melanocarpa [Michx.] Elliott). In: Hoppe B (ed.). Handbuch des Arznei- und Gewürzpflanzenbaus, Band 4. Bernberg, Germany: Verein für Arznei- und Gewürzpflanzen SALUPALNTA e.v. Bernberg. 2012;95-110.
6. Smith HH. Ethnobotany of the Forest Potawatomi Indians. Bulletin of the Public Museum of the City of Milwaukee. 1933;7(1).75,108.
7. Moerman DE. Native American Ethnobotany. Portland, OR: Timber Press; 1998.
8. Chrubasik C, Li G, Chrubasik S. The clinical effectiveness of chokeberry: a systematic review. Phytother Res. 2010;24:1107-1114.
9. Stack LB. Aronia (black chokeberry). University of Maine Cooperative Extension Website. 2013. Available at: http://umaine.edu/agriculture/home/aronia/. Accessed December 23, 2013.
10.        United States Department of Agriculture (USDA). § 205.606 Nonorganically produced agricultural products allowed as ingredients in or on processed products labeled as “organic”. In: Code of Federal Regulations, Title 7 (7CFR). Washington, DC: National Archives and Records Administration. 2013.
11.        Food and Drug Administration (FDA). 21 CFR §73.250 Fruit juice, Part 73 Listing of color additives exempt from certification. In: Code of Federal Regulations, Title 21 (21CFR). Washington, DC: National Archives and Records Administration. 2013.
12.        United States Pharmacopeial Convention. General Information: Food Ingredients Fraud Database. In: Food Chemicals Codex, 8th Edition. Rockville, MD: United States Pharmacopeial Convention. 2013;1530-1612.
13.        Environmental Protection Agency (EPA). Pesticide Programs (Parts 150 – 180). In: Code of Federal Regulations, Title 40 (40CFR). Washington, DC: National Archives and Records Administration. 2013.
14.        Natural Health Products Directorate (NHPD). Natural Health Products Ingredients Database (NHPID). Ottawa, ON: Health Canada. Available at: http://webprod.hc-sc.gc.ca/nhpid-bdipsn/search-rechercheReq.do. Accessed: December 10, 2013.
15.        Natural Health Products Directorate (NHPD). Licensed Natural Health Products Database (LNHPD). Ottawa, ON: Health Canada. Available at: http://webprod5.hc-sc.gc.ca/lnhpd-bdpsnh/index-eng.jsp. Accessed December 10, 2013.
16.        Phytopharm Klęka SA. Bioaron C®. Available at: http://bioaron.pl/. Accessed December 11, 2013.
17.        European Union. Appendix A referred to in Chapter 1 of Annex IX: List of pharmaceuticals subject to transitional period under Chapter 1. Official Journal of the European Union. September 23, 2003, C 227 E, Volume 46. Available at: http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:C:2003:227E:FULL:EN:PDF. Accessed December 11, 2013.
18.        EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA); Scientific Opinion on the substantiation of health claims related to: anthocyanidins and proanthocyanidins (ID 1787, 1788, 1789, 1790, 1791) pursuant to Article 13(1) of Regulation (EC) No 1924/2006. EFSA Journal. 2011;9(4):2083. Available at: www.efsa.europa.eu/en/search/doc/2083.pdf. Accessed December 11, 2013.
19.        EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA); Scientific Opinion on the substantiation of health claims related to various food(s)/food constituent(s) and health relationships that are not sufficiently defined pursuant to Article 13(1) of Regulation (EC) No 1924/2006. EFSA Journal. 2011;9(6):2228. Available at: www.efsa.europa.eu/en/search/doc/2228.pdf. Accessed December 11, 2013.
20.        European Commission Health & Consumers Directorate. Cosmetic Ingredients and Substances (CosIng®) Database. Brussels, Belgium: European Commission. Available at: http://ec.europa.eu/consumers/cosmetics/cosing/. Accessed December 11, 2013.
21.        Bell DR, Gochenaur K. Direct vasoactive and vasoprotective properties of anthocyanin-rich extracts. J Appl Physiol. 2006;100:1164-1170.
22.        Sonoda K, Aoi W, Iwata T, Li Y. Anthocyanin-rich Aronia melanocarpa extract improves body temperature maintenance in healthy women with cold constitution. SpringerPlus. November 21, 2013;2:626. Doi: 10.1186/2193-1801-626. Available at: www.ncbi.nlm.nih.gov/pmc/articles/PMC3843504/pdf/40064_2013_Article_664.pdf. Accessed January 1, 2014.
23.        Duchnowicz P, Nowicka A, Koter-Michalak M, Broncel M. In vivo influence of extract from Aronia melanocarpa on the erythrocyte membranes in patients with hypercholesterolemia. Med Sci Monit. 2012;18(9):CR569-574.
24.        Sikora J, Broncel M, Markowicz M, Chalubinski M, Wojdan K, Mikiciuk-Olasik E. Short-term supplementation with Aronia melanocarpa extract improves platelet aggregation, clotting, and fibrinolysis in patients with metabolic syndrome. Eur J Nutr. 2012; 51:549-556.
25.        Broncel M, Koziróg M, Duchnowicz P, Koter-Michalak M, Sikora J, Chojnowska-Jezierska J. Aronia melanocarpa extract reduces blood pressure, serum endothelin, lipid, and oxidative stress marker levels in patients with metabolic syndrome. Med Sci Monit. 2010;16(1);CR28-34.
26.        Pilacyzynska-Szczesniak L. Skarpanska-Steinborn A, Deskur E, Basta P, Horoszkiewicz-Hassan M. The influence of chokeberry juice supplementation on the reduction of oxidative stress resulting from an incremental rowing ergometer exercise. Int J Sport Nutr Exerc Metab. 2005;14:48-58.
27.        Smith JD. 2013 Midwest Aronia Association Presentation. Available at: http://midwestaronia.org/wp-content/uploads/2013/04/Jonathan-D-Smith-aronia-presentation-2013-final.pdf. Accessed December 12, 2013.
28.        Kobuszynska M. Poland Pursues Becoming the Berry Supplier for Russia and the EU. Warsaw, Poland: United States Department of Agriculture (USDA) Foreign Agricultural Service (FAS) Global Agricultural Information Network (GAIN). November 27, 2013. GAIN Report Number PL 1336.
29.        United States Department of Agriculture (USDA). 2012 List of certified USDA organic operations. Washington, DC: USDA. 2013. Available at: http://apps.ams.usda.gov/nop/. Accessed December 11, 2013.
30.        Midwest Aronia Association website. Available at: http://midwestaronia.org/. Accessed December 12, 2013.
31.        Mid-Atlantic Aronia Growers Association. Maine Gardener: It’s no blueberry, but Aronia has endearing, if sour, charms. Mid-Atlantic Aronia Growers Association website. Available at: http://midatlanticaronia.wordpress.com/. Accessed December 12, 2013.
32.        Myracle A, Stack L, Handley D. Project No. MAC 135: Exploring the Market Potential of Aronia Berries. Orono, ME: Maine Agricultural Center. Available at: http://umaine.edu/maineagcenter/files/2013/06/MAC-135-proposal-2013.pdf. Accessed December 12, 2013.



Chokeberry Juice Consumption Improves Blood Pressure and Lipid Levels in Subjects with Untreated High Normal Blood Pressure
Kardum N, Milovanović B, Šavikin K, et al. Beneficial effects of polyphenol-rich chokeberry juice consumption on blood pressure level and lipid status in hypertensive subjects. J Med Food. October 2015;18(11):1231-1238.
Epidemiological studies have found the intake of foods rich in antioxidants to be associated with lower incidences of cardiovascular disease. Among plant foods, berry fruits tend to have the greatest antioxidant potential due to their high polyphenol content. Compared with other berries, chokeberry (Aronia melanocarpa, Rosaceae) has a significantly higher content of polyphenols and, thus, higher antioxidant activity. The goal of this study was to evaluate the effects of daily chokeberry juice consumption on blood pressure (BP), biochemical parameters, and function of the autonomic nervous system in subjects with high normal BP or grade I hypertension. In a previous study conducted by these authors, chokeberry juice consumption had a positive impact on cellular oxidative status in healthy subjects by stimulating antioxidant enzyme activities and improving membrane fatty acid composition.1

The current study was conducted at Clinical Hospital Center Bezanijska Kosa in Belgrade, Serbia. Twelve men and 11 women (mean age, 47.5 ± 10.4 years) not using antihypertensive drugs were included. The subjects had high normal BP or grade I hypertension according to the European Society of Hypertension and the European Society of Cardiology classification, meaning a systolic BP (SBP) of 130-159 mm Hg and diastolic BP (DBP) of 85-99 mm Hg. The subjects were instructed to drink 200 mL of polyphenol-rich organic chokeberry juice (donated by Conimex Trade d.o.o.; Belgrade, Serbia) daily for 4 weeks as part of their usual diet. The chokeberry juice contained 386 ± 9.7 mg of total phenolics, expressed as gallic acid, per 100 g. Results of phenolic content analyses revealed cyanidin 3-galactoside to be the most abundant anthocyanin (107.6 ± 7.8 mg per 100 g).
At baseline and after 4 weeks of treatment, the subjects underwent blood draws for biochemical analysis, as well as assessment of the autonomic nervous system and hemodynamic status. Short-term heart rate variability (HRV) and 24-hour electrocardiogram (ECG) monitoring with long-term HRV analysis were included in the assessment. Biochemical parameters included cardiovascular disease markers such as lipid profile, C-reactive protein (CRP), and glucose levels.

After 4 weeks, there were reductions in total cholesterol, low-density lipoprotein cholesterol (LDL-C), and triglycerides; however, the only significant reduction was in the triglyceride levels (P<0.05). Markers of kidney and liver function remained within normal limits during the study. Significant reductions (P<0.05) were also observed in the average 24-hour and awake SBP and DBP, and 24-hour pulse pressure.
Because the autonomic nervous system plays a central role in BP regulation, the authors divided the subjects into 2 groups based on sympathetic or parasympathetic activity. The authors used low-frequency power (LF) and high-frequency power (HF) analysis to assign subjects into either the sympathetic (n=12) or parasympathetic (n=11) group. In the sympathetic activity group, a statistically significant reduction (P<0.05) was observed in 24-hour and awake SBP, awake DBP, standard deviation (SD) of awake SBP, and awake pulse pressure. No significant changes were seen in the parasympathetic activity group.

Short-term HRV analysis revealed significant decreases in both very low-frequency power (P<0.05) and HF (P<0.01) after 4 weeks of chokeberry juice consumption. Long-term HRV analysis revealed a decreasing effect (P<0.01) on the SD of normal RR intervals. The RR interval, or 1 complete cardiac cycle, is used to assess ventricular rate. No significant changes were observed in 24-hour ambulatory ECG recordings after 4 weeks. The authors point out that measures of HRV, particularly the RR interval, could be used as independent indicators for risk of coronary deaths.2 After 4 weeks, CRP levels were reduced, but not significantly.

These findings agree with previously published data, which show significant reductions in DBP and SBP after chokeberry consumption.3,4

The authors attribute the beneficial effects of chokeberry juice consumption on BP levels to its high polyphenol content, which reduces vascular oxidative stress not only by directly interacting with reactive oxygen species, but also by stimulating endogenous antioxidant defense. Other cardioprotective effects of polyphenols could be exerted through improved endothelial function, based on an increase in endothelium synthesis of nitric oxide.

In this study, the consumption of polyphenol-rich chokeberry juice improved BP levels and lipid status in subjects with pharmacologically untreated high normal BP or grade I hypertension. And because a greater decrease of BP was noted in subjects with prevalence of sympathetic activity, the use of chokeberry juice to prevent cardiovascular disease could be more effective in subjects at higher risk. The study was limited by small sample size and short duration.

—Shari Henson

References
1Kardum N, Takić M, Šavikin K, et al. Effects of polyphenol-rich chokeberry juice on cellular antioxidant enzymes and membrane lipid status in healthy women. J Funct Foods. 2014;9:89-97.
2Bigger JT Jr, Fleiss JL, Steinman RC, Rolnitzky LM, Schneider WJ, Stein PK. RR variability in healthy, middle-aged persons compared with patients with chronic coronary heart disease or recent acute myocardial infarction. Circulation. 1995;91(7):1936-1943.
3Skoczyńska A, Jędrychowska I, Poręba R, et al. Influence of chokeberry juice on arterial blood pressure and lipid parameters in men with mild hypercholesterolemia. Pharmacol Rep. 2007;59(Suppl 1):177-182.
4Naruszewicz M, Łaniewska I, Millo B, Dłużniewski M. Combination therapy of statin with flavonoids rich extract from chokeberry fruits enhanced reduction in cardiovascular risk markers in patients after myocardial infraction [sic] (MI). Atherosclerosis. 2007;194(2):e179-e184 


Comments