Research
Macro partitioning
High dietary linoleic acid intake inhibits the conversion of short-chain omega-3 fatty acids (ALA) to long-chain omega-3 fatty acids (EPA/DHA) by inhibiting delta-desaturase enzyme activity.
If you consume high amounts of seed oils, your body's ability to convert plant-based omega-3s (ALA) into active forms (EPA/DHA) is reduced. Consider direct sources of EPA/DHA if you are not consuming fish.
ModerateSupportsMEDIUM confidence
when large amounts of LA are consumed through the diet, delta desaturase enzyme activity is inhibited, making it difficult for the body to convert short-chain omega-3 fatty acids, like ALA, into long-chain omega-3 fatty acids
Why this rating
Cites studies showing inhibition, but the clinical significance in humans is debated.
Source
Linoleic Acid: A Narrative Review of the Effects of Increased Intake in the Standard American Diet and Associations with Chronic Disease
Joseph Mercola et al. · Nutrients · 2023
DOI 10.3390/nu15143129
narrative_reviewCited 145×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Linoleic acid has a long half-life in the body (approximately two years), meaning that reducing intake takes years to significantly lower tissue levels.Good
- Excessive dietary intake of linoleic acid (LA) leads to the formation of oxidized linoleic acid metabolites (OXLAMs) and alters cardiolipin composition, causing mitochondrial dysfunction and contributing to chronic diseases such as cardiovascular disease, cancer, and Alzheimer's.Moderate
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