Alpha‑GPC
Glycerophosphocholine, a bioavailable choline precursor.
Pharmacology
Contents
Related comparisons
Alpha-GPC vs CDP-CholineWHAT IS ALPHA-GPC?
Detailed overview
Alpha-GPC (L-α-glycerylphosphorylcholine) is a natural phospholipid metabolite that the body incorporates into acetylcholine and phosphatidylcholine. It crosses the blood-brain barrier with ~95% bioavailability. An acute-acting choline source – quickly raises CNS acetylcholine, hence among the "feelable" choline forms (vs. CDP-Choline which supports long-term baseline). Pre-workout mind-muscle benefit documented (PMID PMC4595381) – included in many pre-workout formulas. Supports phospholipid synthesis at the membrane level (PMID 8190709). At high doses, cholinergic overload (headache, brain fog, anxiety) → Magnesium L-Threonate can mitigate. Prescription medicine in Italy (Delecit, for vascular dementia) and a supplement elsewhere.
Mechanism
Choline precursor (ACh synthesis)
Half-life
~4-6 h
Legal status
EU Rx (IT) / OTC elsewhere
Receptor profile
- Acetylcholine (via choline)Strong
- Muscarinic / nicotinic ACh receptorsStrong
- Phosphatidylcholine (membrane synthesis)Moderate
- Growth hormone (hypothalamic release)Moderate
Safety
Side effects, stop signs, contraindications
Side effects · 7
- Headache (cholinergic overload, typically at higher doses)
- Nausea and gastrointestinal discomfort
- Brain fog, mental heaviness when overdosed
- Anxiety, nervousness from high cholinergic tone
- Vivid dreams, sleep disturbance (especially with evening dosing)
- Dizziness, sensation of low blood pressure
- Sweating, increased salivation (cholinergic sign)
Contraindications · 6
- Pregnancy and breastfeeding (insufficient safety data)
- Stroke history / cardiovascular risk: chronic high-dose use has been associated with increased stroke risk, medical supervision needed
- Depression: excessive cholinergic tone may worsen mood
- Concurrent use with anticholinergic medications (opposing effects)
- Alongside cholinergic / cholinesterase-inhibitor agents (risk of additive cholinergic effect)
- Caution with low blood pressure or seizure-threshold sensitivity
Related Nootropics
Same therapeutic category
FAQ
FAQ
Alpha-GPC is a highly bioavailable source of choline, meaning it supplies the raw building block the brain needs to make acetylcholine, one of its key signaling chemicals. It crosses into the brain easily and provides a fast, short-acting boost to choline levels.
Telegram
Have a question about Alpha‑GPC?
Reach out to us on Telegram for a personalized stack. We'll be happy to help.
Personalized consultation
Want a detailed conversation tailored to your data?
Fill out the prep intake form (your goals, training and health data), and the advisor prepares from it to give genuinely personalized guidance.
Fill out the form~5–7 min · prep questionnaire · confidential · GDPR-compliant
Structure & chemistry
The information here is strictly for educational and scientific purposes. It does not replace medical advice or clinical consultation, and it does not encourage illegal substance or pharmaceutical use. Data is sourced. When in doubt, consult your doctor.