The Claim
In 2014, 50% of North American over-the-counter omega-3 supplements exceeded voluntary international safety limits for oxidative markers (peroxide, anisidine, or TOTOX), indicating degradation of fatty acids in commercially available products.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Half of the omega-3 supplements sold over the counter in North America in 2014 had oxidative damage levels above international safety limits, meaning the fatty acids in these products had broken down.
See the scientific wording
Among North American over-the-counter omega-3 supplements tested in 2014, 50% exceeded voluntary international safety limits for oxidative markers (peroxide, anisidine, or TOTOX), indicating widespread degradation of fatty acids in commercially available products, which may compromise their efficacy and safety for consumers.
Omega-3 fatty acids in supplements break down when exposed to oxygen, light, or heat, creating harmful byproducts that make the oil rancid and reduce its biological value.
What the research says
1 studyScientists tested 171 omega-3 supplements sold in North America and found that half of them had gone bad — like rancid oil — meaning they might not work as promised and could even be harmful. This matches exactly what the claim says.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.