The Claim
Among 47 fish oil supplements tested in New Zealand, 72% met the GOED voluntary limit for primary oxidation (Peroxide Value <5 meq O₂/kg), and 98% met the European Pharmacopeia limit (Peroxide Value <10 meq O₂/kg), indicating that the majority of tested products complied with established regulatory oxidation thresholds.
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.
Of 47 fish oil supplements tested in New Zealand, 72% met the stricter international standard for oxidation, and 98% met the less strict standard, showing most products met regulatory limits for oxidation.
See the scientific wording
Among 47 fish oil supplements tested in New Zealand, 72% met the GOED voluntary limit for primary oxidation (Peroxide Value <5 meq O₂/kg), while 98% met the less stringent European Pharmacopeia limit (PV <10 meq O₂/kg), indicating most products are within acceptable oxidation thresholds under regulatory standards.
Fish oil stays fresh because manufacturers protect it from air, light, and heat during production and storage, which prevents the fatty acids from breaking down and forming harmful compounds.
What the research says
1 studyScientists tested 47 fish oil supplements in New Zealand and found that almost all of them (98%) had low enough oxidation to meet international safety rules, and most (72%) met an even stricter industry standard. So yes, most fish oil pills are not spoiled.
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.