Alpha-GPC vs Gotu Kola (Centella asiatica)

Mechanism

Highly bioavailable choline source that crosses the blood-brain barrier efficiently via passive diffusion. Serves as a direct precursor for acetylcholine synthesis and phosphatidylcholine, a major structural component of neuronal membranes. Also stimulates growth hormone release via cholinergic activation of GHRH-releasing neurons in the hypothalamus. Contains ~40% choline by weight.

Standard Dosing

300-600 mg/day

Timing

Morning or pre-workout. Can be taken with or without food. Split into 1-2 doses.

Cycle Duration

Ongoing; no cycling required for standard doses

Side Effects

• GI distress
• Headache
• Dizziness
• Fishy body odor at high doses
• Potential TMAO elevation with chronic high-dose use

Contraindications

• Active peptic ulcer disease
• TMAO concerns — emerging research links high choline intake to elevated TMAO and cardiovascular risk

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Mechanism

Pentacyclic triterpenes — asiaticoside, madecassoside, asiatic acid, and madecassic acid — provide neuroprotection through multiple mechanisms: inhibition of acetylcholinesterase activity and enhancement of cholinergic transmission; reduction of phospholipase A2 (PLA2) activity to attenuate neuroinflammation; protection against beta-amyloid aggregation and tau hyperphosphorylation; and upregulation of BDNF to promote neuronal growth and synaptic plasticity. Asiaticoside enhances collagen synthesis and wound healing, while asiatic acid activates the MAPK/ERK pathway to promote neurite outgrowth.

Standard Dosing

500-1000 mg/day of standardized extract (35-45% triterpenes) or 750-1500 mg/day of whole herb extract

Timing

Morning or split morning/afternoon. With or without food. Acute mood effects (alertness, reduced anger) noted within 1 hour of dosing.

Cycle Duration

Ongoing; traditional use suggests no cycling required. Clinical trials run 2-6 months.

Side Effects

• GI discomfort
• Drowsiness
• Headache
• Skin irritation (topical use)
• Hepatotoxicity (rare, with prolonged high-dose use)

Contraindications

• Pregnancy (traditionally contraindicated; may have emmenagogue effects)
• Hepatic disease (rare hepatotoxicity reported)
• Scheduled surgery (may affect wound healing dynamics)

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