Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Gotu Kola (Centella asiatica) | Oxiracetam | |
|---|---|---|
| Category | Nootropics | Nootropics |
| Standard Dose | 500-1000 mg/day of standardized extract (35-45% triterpenes) or 750-1500 mg/day of whole herb extract | 800-2400 mg/day divided into 2-3 doses |
| Timing | Morning or split morning/afternoon. With or without food. Acute mood effects (alertness, reduced anger) noted within 1 hour of dosing. | Morning and early afternoon; avoid evening dosing due to mild stimulatory effect. Can be taken with or without food (water-soluble). |
| Cycle Duration | Ongoing; traditional use suggests no cycling required. Clinical trials run 2-6 months. | Cycles of 8-12 weeks on, 4 weeks off |
| Evidence Level | moderate_human | moderate_human |
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.
500-1000 mg/day of standardized extract (35-45% triterpenes) or 750-1500 mg/day of whole herb extract
Morning or split morning/afternoon. With or without food. Acute mood effects (alertness, reduced anger) noted within 1 hour of dosing.
Ongoing; traditional use suggests no cycling required. Clinical trials run 2-6 months.
Modulates cholinergic neurotransmission by preventing scopolamine-induced decreases of acetylcholine in the hippocampus and cortex. Enhances D-aspartate release and modulates AMPA receptor activity. Demonstrates mild stimulatory properties without affecting dopaminergic or serotonergic systems, making it a 'cleaner' cognitive enhancer among racetams.
800-2400 mg/day divided into 2-3 doses
Morning and early afternoon; avoid evening dosing due to mild stimulatory effect. Can be taken with or without food (water-soluble).
Cycles of 8-12 weeks on, 4 weeks off
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