A nut is a fruit consisting of a hard or tough nutshell protecting a kernel which is usually edible. In general usage and in a culinary sense, a wide variety of dry seeds are called nuts, but in a botanical context "nut" implies that the shell does not open to release the seed (indehiscent).

Most seeds come from fruits that naturally free themselves from the shell, but this is not the case in nuts such as hazelnuts, chestnuts, and acorns, which have hard shell walls and originate from a compound ovary. The general and original usage of the term is less restrictive, and many nuts (in the culinary sense), such as almonds, pistachios, and Brazil nuts,[1] are not nuts in a botanical sense. Common usage of the term often refers to any hard-walled, edible kernel as a nut.[2] Nuts are an energy-dense and nutrient-rich food source.[3]


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A seed is the mature fertilised ovule of a plant; it consists of three parts, the embryo which will develop into a new plant, stored food for the embryo, and a protective seed coat. Botanically, a nut is a fruit with a woody pericarp developing from a syncarpous gynoecium. Nuts may be contained in an involucre, a cup-shaped structure formed from the flower bracts. The involucre may be scaly, spiny, leafy or tubular, depending on the species of nut.[4] Most nuts come from the pistils with inferior ovaries (see flower) and all are indehiscent (not opening at maturity). True nuts are produced, for example, by some plant families of the order Fagales. These include beech (Fagus), chestnut (Castanea), oak (Quercus), stone-oak (Lithocarpus) and tanoak (Notholithocarpus) in the family Fagaceae, as well as hazel, filbert (Corylus) and hornbeam (Carpinus) in the family Betulaceae.

Also widely known as nuts are dry drupes, which include pecans (Carya illinoensis), almonds (Prunus amygdalus), macadamia (Macadamia integrifolia), candlenut (Aleurites moluccanus), water caltrop (Trapa bicornis) and walnuts (Juglans regia). A drupe is an indehiscent fruit which has an outer fleshy part consisting of the exocarp, or skin, and mesocarp, or flesh, which surround a single pit or stone, the endocarp with a seed (kernel) inside. In a dry drupe, the outer parts dry up and the remaining husk is part of the ovary wall or pericarp, and the hard inner wall surrounding the seed represents the inner part of the pericarp.[4]

A small nut may be called a "nutlet" (or nucule,[citation needed] a term otherwise referring to the oogonium of stoneworts). In botany, the term "nutlet" specifically refers to a pyrena or pyrene, which is a seed covered by a stony layer, such as the kernel of a drupe.[citation needed] Walnuts and hickories (Juglandaceae) have fruits that are difficult to classify. They are considered to be nuts under some definitions but are also referred to as drupaceous nuts.[citation needed]

In common use, a "tree nut" is, as the name implies, any nut coming from a tree. This most often comes up regarding food allergies; a person may be allergic specifically to peanuts (which are not tree nuts but legumes), whereas others may be allergic to the wider range of nuts that grow on trees.

Nuts used for food are a common source of food allergens.[3] Reactions can range from mild symptoms to severe ones, a condition known as anaphylaxis, which can be life-threatening. The reaction is due to the release of histamine by the body in response to an allergen in the nuts, causing skin and other possible reactions.[10] Many experts suggest that a person with an allergy to peanuts should avoid eating tree nuts, and vice versa.[3][11]

Nuts contain the diverse nutrients that are needed for the growth of a new plant.[3] Composition varies, but they tend to have a low water and carbohydrate content, with high levels of fats, protein, dietary minerals, and vitamins.[3] The digestibility of the protein at about 90% is slightly lower than that of meat and fish, but can be improved by chewing thoroughly.[12] The fats are largely unsaturated and nuts are a source of essential omega-3 fatty acids.[3][13] As part of a healthy human diet, long-term consumption of diverse nutrients in nuts may contribute to a lower risk of cardiovascular diseases, reduced levels of blood cholesterol, and lower all-cause mortality.[3] For vegetarians and vegans, nuts provide many of the essential nutrients which may be in short supply in other plant foods.[12]

Nuts supply nutrients for humans and wildlife.[3] Because nuts generally have a high oil content, they are a significant energy source.[3] Many seeds are edible by humans and used in cooking, eaten raw, sprouted, or roasted as a snack food, ground to make nut butters, or pressed for oil that is used in cooking and cosmetics.[3] Regular nut consumption of more than 5 ounces (140 g) per week may benefit weight control and contribute to lowering body weight in humans.[3]

Nuts are the source of energy and nutrients for the new plant. They contain a relatively large quantity of calories, essential unsaturated and monounsaturated fats including linoleic acid and linolenic acid, vitamins, and essential amino acids.[3] Many nuts are good sources of vitamin E, vitamin B2, folate, fiber, and essential minerals, such as magnesium, phosphorus, potassium, copper, and selenium.[3][14]

Nuts are under preliminary research to assess whether their consumption is associated with lower risk for some diseases, such as cardiovascular diseases and cancer.[3][15] A 2014 review indicated that consuming one or more servings of nuts or peanut butter per day was associated with lower risk of ischemic heart disease, overall cardiovascular disease, stroke in women, and all-cause mortality.[16] A 2022 umbrella review confirmed these findings and found a 22% reduction in all-cause mortality.[17]

Our Nuts.com family loves all varieties of nuts and values the distinct tastes, flavors, textures, and aromas of each type of nut. We believe that when you buy nuts, they should always be fresh and of superior quality so that you can enjoy them to the fullest.

As you can imagine, we keep our nut department well-stocked with every kind of nut. You can even buy bulk nuts by the case at wholesale prices. All nuts are a good source of nutrients, and depending on your preference, you can toss them over salads, use them in recipes, or just snack on them straight out of the bag.

Grab a handful of almonds to munch on between meals or toss them over a salad for a boost of protein, healthy fats, and antioxidants. Or try almond flour to make some scrumptious baked goodies. Pound for pound, almonds are the most nutrient dense of all tree nuts.

We always catch my dad snacking on cashews. Fortunately, the good news here is that cashews are loaded with fiber and protein. And keep in mind that peanuts are not just meant for the ball games. They pack seven grams of protein per serving, and are a good source of antioxidants and B-complex vitamins, so feel free to enjoy them anytime!

Looking for new ways to add more nuts to your diet? Jump-start your mornings by adding nuts to your breakfast of oatmeal, cereal, or yogurt. Before you head out for the day, mix up your own custom trail mix with equal parts nuts, seeds, and dried fruit. Or toss a handful of nuts over salads for a protein punch and delicious nutty crunch. Try our seasoned nuts for an extra boost of flavor in your snacking regimen.

These nuts are especially rich in vitamin E, a fat-soluble nutrient that functions as an antioxidant to protect your cells against oxidative damage. This vitamin also supports immune function and cellular communication.

These nuts are an excellent source of copper, a mineral that your body needs to produce enzymes involved in energy production and neurotransmitter synthesis. Copper also aids immune function and blood vessel development.

We have a wide selection of organic, raw, sugar free, salt, and no salt products made just for you. Because Nuts to You believes in fresh, high-quality products, we roast our own nuts and pop our own popcorn every day.

Eating nuts as part of a healthy diet may be good for the heart. Nuts contain unsaturated fatty acids and other nutrients. And they're a great snack food. They are inexpensive, easy to store and easy to pack when you're on the go.

Adults should aim to eat about 4 to 6 servings of unsalted nuts a week as part of a healthy diet. Serving recommendations for kids vary, depending on age. Ask your pediatrician how many servings of nuts are OK for your child.

There are several ways that nuts could have such an effect. The unsaturated fats they contain help lower LDL (bad) cholesterol and raise HDL (good) cholesterol. One group of unsaturated fat found in walnuts, the omega-3 fatty acids, appears to prevent the development of erratic heart rhythms. Omega-3 fatty acids (which are also found in fatty fish such as salmon and bluefish) may also prevent blood clots, much as aspirin does.

MARTA GUASCH: Previous evidence has shown that the frequent nut consumption is associated with reduced risk of cardiovascular disease, and also cardiovascular risk factors, including type 2 diabetes, dyslipidemia, metabolic syndrome. But most of these previous prospective studies have focused on total nut consumption in relation to the risk of cardiovascular disease. So the effect of specific types of nuts, such as walnuts and peanuts and also peanut butter, with cardiovascular disease and specific types of cardiovascular disease, such as stroke or coronary heart disease, was unclear. So we thought that analyzing the effect of several types of nuts, including total nuts, peanuts, walnuts, and tree nuts, and the relation with cardiovascular disease, stroke, and myocardial infarction could be of particular interest.

MARTA GUASCH: So, yeah, briefly, in the three large prospective cohort studies, with up to 32 years of follow-up, we found that people who regularly eat nuts, including peanuts, walnuts, and tree nuts, have a lower risk of developing cardiovascular disease, and also coronary heart disease, compared to people who never or almost never consume nuts. And we found a consistent inverse association with total nut consumption and total cardiovascular disease of 14% lower risk for those consuming five or more times per week of total nuts, and 20% lower risk of coronary heart disease. And also, we find the specific benefict for consuming walnuts one or more times per week, and also for peanuts and tree nuts, both for cardiovascular disease and coronary heart disease. 2351a5e196

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