Alpha-GPC (L-Alpha glycerylphosphorylcholine or Choline alfoscerate) is a naturally occurring choline compound found in the brain and in some foods such as soy and milk. It is also marketed as a dietary supplement. Alpha-GPC is distinct from other choline sources because it is a phospholipid metabolite, meaning it is derived from fats and can readily cross the blood-brain barrier. Often utilized for its potential cognitive benefits, Alpha-GPC serves as a precursor for the neurotransmitter acetylcholine, which plays a critical role in memory, learning, and other cognitive functions. It is also involved in the structural integrity of cell membranes. (NIH ODS, PubChem)
Deep dive
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Known interactions
Category rule: glp1 × supplement
Note
GLP-1 medications slow stomach emptying, changing how/when oral supplements absorb; rapid weight loss raises the importance of protein and micronutrients.
Time oral supplements when nausea is lowest; prioritize protein and micronutrients; discuss with your provider.
Category rule: supplement × medication
Note
Some supplements change how the body processes medications (absorption, liver enzymes, or additive effects).
Specific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist.
Compound-pair rule
Synergy
Racetams increase acetylcholine turnover; adding a choline source can prevent headaches from choline depletion.
Consider stacking 300–600 mg alpha-GPC with racetam doses.
Compound-pair rule
Synergy
Racetam + choline source stack is well-established for cognition and headache prevention.
Stackwise compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician.
Related compounds
Others in the supplement category or studied for the same goals.