Alpha-GPC
Evidence: ★★★☆☆ · Status: OTC Supplement
In plain English
The most brain-penetrating choline — raw material for the focus/memory chemical, plus a small pre-workout growth-hormone and mind-muscle bump.
How it works
Most bioavailable choline source crossing the blood-brain barrier → raises acetylcholine; also acutely stimulates GH secretion. Used in Europe (Gliatilin) for cognitive decline.
Molecular target & official sources
CHAT (NCBI Gene) · Alpha-GPC (PubChem CID 71920)
Protocol
300–600 mg.
Watch out
One observational stroke-risk signal (unconfirmed); fishy odour at high doses.
Bottom line
Most potent OTC cholinergic; useful for low-egg diets.
Helps with: Build Muscle & Strength · Focus & Cognition · Hormones & Testosterone
Stacks with
Caffeine and huperzine A for a pre-workout / focus stack.
Shares a pathway — often paired with: Caffeine, Citicoline (CDP-Choline), Bacopa Monnieri, Racetams (Piracetam, Aniracetam, Oxiracetam, Phenylpiracetam).
Avoid combining with
Too much acetylcholine causes headaches and tension — start low.
Availability & where to buy
Available over the counter. Widely available OTC — e.g. iHerb (ships worldwide); in Singapore also Guardian, Watsons, GNC, Shopee / Lazada. Look for a third-party-tested / GMP mark and check the dose per serving. ~S$25–40/month.
How it works: the Cholinergic pathway →
Used in these protocols
Common questions
Does Alpha-GPC actually work?
Human-evidence rating: 3 of 5. Most potent OTC cholinergic; useful for low-egg diets.
How do you take Alpha-GPC?
300–600 mg.
What are the risks or side effects of Alpha-GPC?
One observational stroke-risk signal (unconfirmed); fishy odour at high doses.
Is Alpha-GPC legal or approved?
Regulatory status: OTC Supplement.