Educational dose reference only — not medical advice, not a product ranking, and not a pass/fail on whether a supplement will work for you. Part of our evidence tools. The reason check shows what any entry's trial found, outcome first.
NIH DSLD market slice
25 ingredients~93,516 matched label rows16 January 2026
Ashwagandha
Floor300 mg
Median200 mg
Below60%
Berberine
Floor1,000 mg
Median400 mg
Below85%
Chromium picolinate
Floor1,000 mcg
Median200 mcg
Below76%
Collagen peptides (hydrolyzed)
Floor2.5 g
Median1.9 g
Below54%
Creatine monohydrate
Floor3–5 g
Median3 g
Below48%
Dietary protein (complete)
Floor1.2–1.6 g/kg
MarketScales with body weight
Garlic (aged extract)
Floor1.2 g
Median0.4 g
Below99%
Ginkgo biloba (EGb 761)
Floor120–240 mg
Median60 mg
Below66%
Glucomannan (konjac)
Floor3 g
Median1 g
Below96%
Green tea extract (EGCG)
Floor800 mg
Median100 mg
Below96%
Korean red ginseng (Panax ginseng)
Floor3 g
Median0.1 g
Below100%
L-arginine
Floor6 g
Median0.8 g
Below99%
L-citrulline
Floor1.5 g
Median3 g
Below32%
Maca root (Lepidium meyenii)
Floor3 g
Median0.3 g
Below94%
Magnesium (elemental)
Floor300 mg
Median100 mg
Below85%
Magnesium L-threonate
Floor2,000 mg
Median2,000 mg
Below41%
Melatonin
Floor0.5 mg
Median3 mg
Above95%
Nicotinamide riboside
Floor1,000 mg
Median100 mg
Below99%
Omega-3 (EPA + DHA combined)
Floor1–2 g
Median0.6 g
Below76%
Potassium
Floor99 mg
Median475 mg
Below31%
Psyllium husk fibre
Floor11 g
Median1 g
Below98%
Red yeast rice
Floor3,600 mg
Median900 mg
Below100%
Saffron (Crocus sativus) extract
Floor30 mg
Median30 mg
Below46%
Urolithin A
Floor500–1,000 mg
MarketScales with body weight
Vitamin B12 (cobalamin)
Floor1,000 mcg
Median50 mcg
Below90%