The Claim
Fish oil supplements sourced from countries other than New Zealand or Australia are significantly more expensive but exhibit no statistically significant difference in EPA/DHA content or oxidation levels compared to those from New Zealand or Australia, indicating that geographic origin is not a reliable predictor of product quality.
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.
Fish oil supplements from countries other than New Zealand or Australia cost more but contain the same amounts of EPA and DHA and show similar levels of oxidation, meaning where they are made does not determine how good they are.
See the scientific wording
Fish oil supplements from countries other than New Zealand or Australia were significantly more expensive but showed no difference in EPA/DHA content or oxidation levels, indicating that origin does not guarantee quality.
What the research says
1 studyStudy: Fish oil supplements in New Zealand are highly oxidised and do not meet label content of n-3 PUFA
This study found that even fish oil supplements made in New Zealand — often thought to be high-quality — often had less healthy fats than advertised and were already spoiled. That means where the supplement comes from doesn’t tell you if it’s good or not.
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.