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DHA is incorporated into membrane phospholipids (primarily phosphatidylethanolamine and phosphatidylserine) of neurons and photoreceptors. Its 22-carbon, 6-double-bond structure creates unique membrane properties: (1) membrane fluidity — DHA's highly unsaturated chains keep membranes fluid, enabling rapid receptor conformational changes (essential for neurotransmission and rhodopsin function in vision); (2) lipid raft organization — DHA modulates cholesterol-rich microdomains critical for signal transduction; (3) neuroprotectin D1 (NPD1) synthesis — DHA is enzymatically converted to NPD1, a specialized pro-resolving mediator that protects neurons from oxidative damage and apoptosis; (4) BDNF expression — DHA upregulates brain-derived neurotrophic factor; (5) anti-inflammatory via resolvin D series production.
Based on independent third-party laboratory analysis
Category pass rate: ~90% of fish oil products passed content testing. Rancidity is the primary failure mode — ~10% of products are already oxidized before opening.
Contamination risk: MODERATE. All tested products passed heavy metal testing. Mercury, lead, cadmium all below detection limits. Fish oil purification processes (molecular distillation) effectively remove contaminants.
Independently graded against 173,636 indexed supplements with 177 published clinical interactions, sourced from PubMed, FDA CAERS, openFDA, and NIH DSLD | Last updated:
Not medical advice. Based on published clinical research and systematic reviews.
DHA · interaction landscape
6 flagged
3
Dangerous
2
Moderate
0
Timing
1
Pre-op
Safety
Clinically significant interactions per published research. Talk to your prescriber or pharmacist before using this supplement if you take any of these.
Warfarin (Coumadin)
SourcePMID: 25062404
Clopidogrel (Plavix)
SourceFDA label
High-dose Aspirin
SourceClinical consensus
Moderate interactions. Monitoring, timing separation, or dose adjustment may be required.
Blood pressure medications
SourceClinical consensus
Orlistat (Alli)
SourceFDA label
Stop 2 weeks before surgery
Bleeding risk from antiplatelet effect.
Educational information only. This is not medical advice. These statements have not been evaluated by the FDA. Talk to your prescriber before starting, stopping, or combining any supplement with prescription medication.