mechanistic
Analysis v1
Strong Support
A specific lipid molecule called phosphatidylcholine acyl-alkyl C34:3 may explain a small portion of why people who are more physically active have a lower risk of colorectal cancer, but this connection becomes weaker when there is a longer delay between activity and cancer diagnosis.
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Evidence from Studies
Supporting (1)
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Community contributions welcome
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Identifying Metabolomic Mediators of the Physical Activity and Colorectal Cancer Relationship
Case-Control Study
Human
2025 Apr 3This study found that people who are more physically active have higher levels of a specific fat molecule (PC ae C34:3), and this molecule helps explain why being active lowers the risk of colorectal cancer — about 7.4% of the benefit comes from this one molecule.
Contradicting (0)
0
Community contributions welcome
No contradicting evidence found
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.