OstroVit review in one line: the Polish brand's own published lab reports measured more protein than the 73 g per 100 g on its label. Two 2026 reports read 75.2 g and 76.9 g. The catch: the maker supplied every sample.
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OstroVit, a Polish company based in Zambrow, links lab reports on its product pages. Both protein reports are from J.S. Hamilton Poland, an accredited lab in Gdynia. One, dated 8 April 2026, found 75.2 g per 100 g, plus or minus 6.0, in a 700 g chocolate tub. The other, dated 20 March 2026, found 76.9, plus or minus 6.2, in a 2000 g vanilla tub. Both labels declare 73 g.
Apply the lab's margin and the results span 69.2 to 81.2 g and 70.7 to 83.1 g. The label figure sits inside both ranges. So the reports agree with the label, without proving a tub holds more.
Sources: J.S. Hamilton Poland reports 291248/26/GDY and 221692/26/GDY. The two ranges are this page's own sums.
The third report, dated 27 February 2026, covers WPC 80, a different product. It lists lead below 0.010, cadmium at 0.0011 and mercury below 0.0010 milligrams per kilogram, each marked Pass. Its limits, from Commission Regulation (EU) 2023/915, are 3.0, 1.0 and 0.10. That puts lead at least 300 times under its limit, cadmium about 900 times and mercury at least 100 times. Arsenic is not on the panel. No batch in the three has both a protein and a metals result.
Source: J.S. Hamilton Poland report 151356/26/GDY, with the limits it cites. The ratios are worked out here.
Each report says the lab received its sample from the client. Accreditation covers the measurement, not where the sample came from. Protein was measured as nitrogen times 6.38, a method that cannot tell whey from other nitrogen sources, and the reports carry no amino acid profile. A 2025 study of whey powders sold in India found taurine based nitrogen spiking in 89 percent of 18 pharmaceutical products and 12.5 percent of 16 nutraceutical ones. It did not test this brand. OstroVit was absent from the Informed Sport certified brands list on 5 August 2026.
Sources: the sample wording on each report; Philips and colleagues, Medicine, 2025, PMID 41239695; the Informed Sport brands list.
What tolerance is a label held to? European Commission guidance from December 2012 allows plus or minus 8 g when a label declares more than 40 g of protein per 100 g. A 73 g claim is tested against about 65 to 81 g, and both readings fall inside.
Will a report exist for my tub? Probably not. Each names one batch code and expiry date, and only a handful exist per product. Peptides Vietnam calls that normal.
Do all flavours declare 73 g? No. On four labels read 5 August 2026, chocolate and vanilla declare 73 g, apple pie 70 g, and the unflavoured WPC 80 line 78 g. Report numbers and batch codes are set out in PV's batch by batch read of the OstroVit reports, with the other guides at Peptides Vietnam.
Sources: the European Commission's December 2012 tolerance table; four OstroVit product pages.