Gotu Kola
Centella asiatica
TL;DR
Gotu kola's best evidence is vascular, not cognitive. Titrated extract at 60-120 mg/day improves symptoms of chronic venous insufficiency — leg heaviness, oedema and capillary leakage — in randomised trials going back decades.
Ideal For
- Chronic venous insufficiency and leg heaviness
- Ankle oedema from venous causes
- Wound healing and hypertrophic scar prevention
- Post-surgical connective tissue recovery
Avoid If
- Liver disease or on hepatotoxic medication
- Pregnancy or breastfeeding
- Continuous use beyond six weeks without a break
- Buying it primarily as a nootropic
Frequently Asked Questions
Overview
Gotu kola is sold mainly as a nootropic and studied mainly as a vascular and wound-healing agent, which is a mismatch worth correcting. The compound with a real trial record is titrated extract of Centella asiatica, standardised to asiaticoside, madecassoside and asiatic acid, tested at 60-120 mg/day in chronic venous insufficiency. Those trials, several of them double-blind and placebo-controlled, report reduced ankle oedema, less leg heaviness and improved microcirculatory parameters including capillary filtration rate — objective measures rather than symptom scores alone. The mechanism fits: triterpenes stimulate type I and III collagen synthesis in fibroblasts and improve the connective tissue integrity of the vein wall, which is precisely what fails in venous insufficiency. The same collagen-stimulating action underpins the second evidence stream, wound healing and hypertrophic scar prevention, where topical and oral use both have support. The cognitive and anxiolytic literature exists but is thin: small trials in older adults and post-stroke patients with mixed results, well short of what would justify buying it as a nootropic. Long courses should be interrupted, as prolonged continuous use has been associated with rare hepatotoxicity.
How It Works
- Triterpenes stimulate type I and III collagen synthesis via TGF-beta
- Strengthens vein wall connective tissue and reduces capillary permeability
- Accelerates granulation tissue formation in wounds
- Animal-level GABAergic and BDNF effects, weakly supported clinically
Quick Facts
- Best evidence is venous insufficiency, not cognition
- 60-120 mg/day of titrated extract in trials
- Improves objective capillary filtration measures
- Cycle it — rare hepatotoxicity with prolonged use
Benefits & Outcomes
No linked outcomes yet. Research is ongoing.
Health Concerns Addressed
Leg Swelling
Gotu kola contains triterpenes that support venous and connective tissue integrity, and several trials show it reduces ankle swelling and symptoms of chronic venous insufficiency. A reasonable adjunct for bilateral venous swelling, but compression remains the mainstay.
Varicose Veins
A real symptomatic effect on heaviness and swelling, backed by objective microcirculatory measures — but it treats symptoms, not the varicosity.
Cellulite
The least-bad supplement option for skin firmness; weak evidence, modest expectations, no cure exists.
Supporting Research7 studies
Effects of Centella asiatica (L.) Urb. on cognitive function and mood related outcomes: a systematic review and meta-analysis
Puttarak P, Dilokthornsakul P, Saokaew S +5 more
No significant effect of Centella asiatica was found on most cognitive outcomes; only alertness and anger showed significant change.
Use of a specific anti-stretch mark cream for preventing or reducing the severity of striae gravidarum. Randomized, double-blind, controlled trial
Garcia Hernandez JA
The use of the anti-stretch mark product is proved to be effective in reducing severity of the striae during pregnancy, prevents the appearance of new striae and halts progression of those already present.
A systematic review of the efficacy of Centella asiatica for improvement of the signs and symptoms of chronic venous insufficiency
Chong NJ, Aziz Z
Most included trials reported improvements in oedema, ankle circumference and capillary filtration rate with Centella asiatica, but the overall quality of evidence was poor.
Treatment of edema and increased capillary filtration in venous hypertension with total triterpenic fraction of Centella asiatica: a placebo-controlled, randomized, dose-ranging trial
De Sanctis MT, Belcaro G, Incandela L +4 more
Total triterpenic fraction of Centella asiatica reduced ankle oedema and capillary filtration rate in a dose-dependent manner versus placebo.
Centella asiatica in wound healing and scar management: a review of clinical and preclinical evidence
Bylka W, Znajdek-Awizen P, Studzinska-Sroka E +1 more
Asiaticoside and madecassoside from Centella asiatica stimulate type I collagen synthesis and improved healing of wounds and hypertrophic scars.
Centella asiatica attenuates anxiety in acute stress: a randomised, double-blind, placebo-controlled study
Jana U, Sur TK, Maity LN +2 more
Centella asiatica significantly attenuated anxiety, stress and depression scores compared with placebo over 60 days.
Improvement of signs and symptoms of chronic venous insufficiency and microangiopathy with Pycnogenol: a prospective, controlled study
Cesarone MR, Belcaro G, Rohdewald P +1 more
Patients with CVI may also experience swelling and ulcers.
Safety Information
Potential Side Effects
Nausea and gastrointestinal upset are the most common. Contact dermatitis with topical use. Rare hepatotoxicity has been reported with prolonged high-dose oral use, and drowsiness occurs at higher doses.
Contraindications
Liver disease, and concurrent use of hepatotoxic drugs. Avoid in pregnancy. Discontinue two weeks before surgery given possible additive sedation with anaesthesia.
Drug Interactions
- Hepatotoxic medications — additive liver risk
- Sedatives — possible additive drowsiness
- Diabetes medications — may affect glucose control
- Cholesterol-lowering drugs — theoretical hepatic interaction
Pregnancy & Breastfeeding
Pregnancy: likely_unsafe
Breastfeeding: likely_unsafe
Dosage Guidelines
Dosage Used in Studies
60-180 mg
Best Time to Take
Split into two or three doses daily
Best Form
Titrated extract standardised to asiaticoside and madecassoside
Bioavailability
Asiaticoside is converted to asiatic acid, the principal active metabolite, with reasonable oral absorption from titrated extracts.
Forms Compared
Titrated extract (TECA/TTFCA)
Standardised extract
Whole herb powder
Topical cream
Food & Timing
With food to reduce nausea.
Medical Disclaimer
The information provided on this website is for educational and informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or before starting any supplement regimen.
Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.