Fish oil only affects the cancer cells’ ability to handle stress — not the healthy liver or colon — which may mean it’s safer and more targeted.
Scientific Claim
Fish oil concentrate does not significantly alter antioxidant enzyme activity (SOD, CAT, GPX) in the liver or colon of mice, suggesting its effects on oxidative stress are selective to tumor tissue.
Original Statement
“The activities of SOD, CAT and GPX were not significantly altered in the liver or colon due to the consumption of FOC... Thus, the effect of consumption of FOC on GPX activity was different in the tumor than in the normal host liver or colon.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The data show no significant changes in normal tissues, and the conclusion correctly frames this as a differential effect. No causal language is used.
Evidence from Studies
Supporting (0)
Contradicting (1)
The study found that fish oil lowered one antioxidant enzyme (GPX) in tumors, which means it does affect these enzymes — contradicting the claim that it doesn’t change them at all.