Alpha-GPC

Key Benefits#

• Rapidly raises brain acetylcholine levels
• Enhances memory formation and recall
• Prevents headaches from nootropic peptides (choline donor)
• Stimulates growth hormone secretion (modest)
• Improves attention and processing speed
• Neuroprotective in Alzheimer's and cognitive decline
• Approved in Europe for Alzheimer's therapy
• Enhances power output in athletes (pre-workout)

Mechanism of Action#

Alpha-GPC is hydrolyzed in the gut to glycerophosphate and choline. The choline fraction is efficiently transported across the blood-brain barrier and incorporated into neuronal membranes as phosphatidylcholine, and used as the precursor for acetylcholine synthesis via choline acetyltransferase (ChAT). Unlike other choline supplements (choline bitartrate, CDP-choline), Alpha-GPC has higher bioavailability (biological availability ~88% vs 1-3% for choline bitartrate). In older subjects and Alzheimer's models, Alpha-GPC improves cholinergic transmission and has been shown to stimulate growth hormone secretion via HPA axis modulation.

Dosing Protocols#

Side Effects#

• Headache (paradoxically, from excess acetylcholine at very high doses)
• Nausea at doses > 1200 mg
• Dizziness
• Fatigue at high doses
• Rare: depression with chronic very high dosing

Contraindications#

Avoid in cholinergic hypersensitivity. Caution with scopolamine or anticholinergic drugs (may reduce their effect). Avoid in known sensitivity to choline or lecithin.

Storage#

Store at room temperature in airtight container. Alpha-GPC is hygroscopic (absorbs moisture) — keep sealed. Capsules preferred over powder for stability. Typically 2-year shelf life.

Featured In Stacks#

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