Phosphatidylinositol sits in cell membranes throughout the body, especially in brain and nerve tissue. Inside cells, it acts as a starting material for signaling molecules like IP3 and DAG. Dietary supplements promote cognitive benefits such as memory and focus, though human studies remain scarce and the idea is not mainstream.
This supplement is different from myo-inositol or D-chiro-inositol, which are studied separately for metabolic and hormonal conditions. You’ll find it as capsules or powder, best taken with a fat-containing meal to improve uptake. Common daily amounts range from 300 to 500 mg, but no standard dose has been established.
Soy-derived forms may trigger allergic reactions in sensitive people. Pregnant or breastfeeding women should exercise caution, as safety has not been studied enough.