Cross-referencing clinical data
A pairing appears on this page only when a trial gave both ingredients together and measured the result. 17-Hydroxydocosahexaenoic Acid has none that clears that bar.
Stitching two separate single-ingredient studies into a pairing is the one thing this engine will not do. When a study of the combination itself holds up at source, it lands here with its citation.
No invented synergy. Where actives were studied on their own rather than together, the record shows each on its own evidence, never a combined effect no trial measured.
Research strength. Research strength says how much work stands behind the combination. It is never a product score.
Independent record. Every finding is cited to a named trial, dated, and never written by the brand.
20 pairings are live across the library today. Checked 20 July 2026.
No study gave these as a pair, so they are not in the card above. But the reason they belong together is settled biochemistry, not a guess, so it is worth knowing.
17-hydroxydocosahexaenoic acid is made from docosahexaenoic acid, so tissue DHA availability sets the ceiling on how much of it can be formed. Studies that raise DHA intake report parallel rises in circulating 17-HDHA. Nobody generates the oxylipin without the parent fatty acid being there first.
Fish oil supplies both DHA and EPA, and the same lipoxygenase machinery converts them into their respective hydroxy fatty acids. Measured plasma and erythrocyte oxylipin profiles shift within weeks of supplementation. What that shift means for any outcome is a separate question from whether it happens.
15-lipoxygenase, the enzyme that oxygenates DHA at carbon 17, is a non-heme iron enzyme and cycles between ferrous and ferric states during catalysis. Iron is structural to the enzyme rather than something extra iron intake would speed up. It belongs on this list as biochemistry, not as a reason to take more iron.
The immediate lipoxygenase product is the hydroperoxide 17-HpDHA, and selenium-dependent glutathione peroxidases reduce it to the stable alcohol 17-HDHA. Selenium status therefore sits on the pathway between the enzyme and the measured metabolite. This is established peroxide handling, not a demonstrated supplementation effect.
Glutathione is the reducing substrate that peroxidases consume when converting fatty acid hydroperoxides to their alcohols. Depleted glutathione leaves hydroperoxides to break down along non-enzymatic routes into reactive aldehydes instead. The relationship is upstream chemistry rather than a pairing anyone doses for.
DHA has six double bonds and oxidises readily without enzymes, producing a scatter of hydroxy and hydroperoxy isomers that are not the ones lipoxygenase makes. Alpha-tocopherol chain-breaks that autoxidation in the oil and in membranes. Fish oil products include it for exactly this reason.
EPA and DHA are handled by the same lipoxygenase and cyclooxygenase enzymes, giving 18-HEPE from EPA and 17-HDHA from DHA. Because they compete for the same catalytic sites, the ratio of the two fatty acids in the diet shapes which oxylipin family predominates. High-EPA and high-DHA oils therefore produce different metabolite profiles from the same total dose.
Nothing specific on file for 17-Hydroxydocosahexaenoic Acid. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.These are the studies our verdict leans on, chosen from the 4 we read for 17-Hydroxydocosahexaenoic Acid. The full linked list is below.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.