Alpha GPC
Also known as: L-Alpha Glycerylphosphorylcholine · Choline Alfoscerate
A highly bioavailable choline source that crosses the blood-brain barrier, supporting acetylcholine synthesis, cognitive function, and growth hormone release.
Overview
Alpha GPC (L-Alpha Glycerylphosphorylcholine) is the most bioavailable form of choline supplementation, capable of efficiently crossing the blood-brain barrier to support acetylcholine synthesis in the brain. Acetylcholine is the primary neurotransmitter involved in memory formation, learning, attention, and muscle contraction. Alpha GPC provides choline directly to neurons, serving as both a cognitive enhancer and a neuroprotective agent. Beyond its nootropic effects, Alpha GPC has been shown to acutely increase growth hormone secretion.
Clinical studies have demonstrated benefits for age-related cognitive decline, and it is approved as a prescription medication for Alzheimer's disease in several European countries.
Mechanism of Action
Rapidly absorbed and converted to phosphatidylcholine and free choline. Choline is taken up by cholinergic neurons and converted to acetylcholine via choline acetyltransferase (ChAT). Also serves as a phospholipid precursor for neuronal membrane synthesis. Stimulates GH release via cholinergic activation of GHRH neurons.
Key Benefits
Potential Side Effects
Common Stacks
This peptide is commonly combined with the following compounds for synergistic effects:
Known Interactions
The following interactions have been documented for Alpha GPC. Always consult a healthcare professional before combining compounds.
Use Caution (1)
Both are choline sources. Using together may cause excessive acetylcholine, leading to headaches, GI distress, or cholinergic side effects. Choose one.
Synergistic (1)
Semax enhances BDNF and neuroplasticity while Alpha GPC provides acetylcholine precursors. Together they support both structural brain health and neurotransmitter production.
Scientific References
Quick Reference
Typical Dose
300mg-800mg
Frequency
1-2x daily
Route
Oral or injectable
Half-Life
~4-6 hours
Cycle Length
Can be used continuously; 5 on 2 off schedule common
FDA Status
Available as dietary supplement in the US. Prescription medication for cognitive disorders in Europe.
Need to calculate dosing?
Use our reconstitution calculator to determine exact syringe measurements.
Open CalculatorThis information is for educational purposes only. Consult a qualified healthcare professional before using any peptide. Dosing information reflects commonly reported protocols and may not be appropriate for everyone.
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