Phosphatidylinositol
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Phosphatidylinositol is a phospholipid, a fat-based molecule that is a normal structural component of cell membranes throughout the body. It also serves as a starting material for certain cell-signaling molecules.
Why it’s used
Included in some supplements as a source of dietary phospholipids, sometimes marketed for cellular or cognitive support.
What the evidence says
There is no NIH ODS fact sheet for phosphatidylinositol, and direct human supplementation research on this specific phospholipid, as distinct from related compounds like phosphatidylserine or phosphatidylcholine, is very limited.
Where we looked
There was no paper to cite here, so this is the search instead — run it yourself and see what we saw.
- PubMed: 9 records · searched August 2026
"Phosphatidylinositol"[Title/Abstract] AND ("dietary supplements"[MeSH] OR supplementation[Title/Abstract] OR supplement[Title/Abstract] OR supplements[Title/Abstract] OR "oral administration"[Title/Abstract]) AND (randomized controlled trial[pt] OR clinical trial[pt] OR meta-analysis[pt] OR systematic review[pt]) AND humans[MeSH] - PubMed: 51836 records · searched August 2026
"Phosphatidylinositol"[Title/Abstract]
This says what this database holds under these terms. It is not a finding that no research exists.
Context
Available research is largely at the level of basic cell biology rather than human supplementation trials, so no established oral dosing protocol exists in the published literature.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.