Nootropics

Gotu Kola (Centella asiatica)

Evidence: moderate_human

Mechanism of Action

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.

Dosing Protocol

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

Maintenance: 500 mg/day of triterpene-standardized extract

Administration: oral

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

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

Notes

Often confused with Bacopa monnieri — both are called 'Brahmi' in different regional Ayurvedic traditions, but they are completely different plants with different mechanisms. The Puttarak 2017 meta-analysis found no significant cognitive effects vs. placebo across domains, but did find improvements in alertness and mood acutely. The Wattanathorn 2008 RCT showed improved working memory at 750mg/day in elderly. Best evidence is for anxiolysis and mood improvement rather than pure cognitive enhancement. The rare hepatotoxicity cases are concerning and should be monitored — periodic liver function tests recommended for prolonged high-dose use. Also widely used for wound healing and skin health.

Stacking

  • Bacopa Monnieri
  • Lion's Mane
  • Ashwagandha
  • Alpha-GPC

Interactions

  • Hepatotoxic drugs [MEDIUM] — Rare case reports of hepatotoxicity with centella; additive hepatic burden with other hepatotoxic agents
  • Sedatives/CNS depressants [LOW] — May potentiate sedative effects
  • Antidiabetic medications [LOW] — May affect blood glucose; monitor
  • Cholesterol-lowering agents [LOW] — Triterpenes may affect lipid metabolism

Contraindications

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

Side Effects

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

Key Papers

  • 10.1038/s41598-017-09823-9
  • 10.1016/j.tifs.2017.10.002
  • 10.3390/antiox8120630

Source Quality

Standardized extracts containing 35-45% triterpenes are preferred. Acid-resistant capsule formulations may improve bioavailability of triterpenes through gastric passage. ECa 233 is a standardized extract (>80% triterpenoid glycosides, primarily madecassoside and asiaticoside) with some clinical validation. Nootropics Depot offers a triterpene-standardized extract. Whole herb extracts are less predictable in active compound content.

Disclaimer: This information is for educational purposes only and is not medical advice. BioAccelera Labs does not diagnose, treat, or prescribe. Consult a licensed healthcare provider before using any compound.

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