Gotu kola is best known for improving circulation in the legs, supporting wound healing, and potentially sharpening memory. It’s a low-growing plant used for centuries in Ayurvedic and traditional Chinese medicine, and modern research has started to clarify which of its traditional uses hold up. Unlike kola nut, gotu kola contains no caffeine and is not a stimulant.
How Gotu Kola Works in the Body
The plant’s benefits come from a group of compounds called triterpenes. The four main ones are asiaticoside, madecassoside, asiatic acid, and madecassic acid. When you take gotu kola orally, the first two compounds are converted in your body into their active forms (asiatic acid and madecassic acid), which then distribute widely through tissues. These compounds reduce inflammation, neutralize oxidative stress, protect cells from premature death, and improve how mitochondria (your cells’ energy generators) function.
Asiatic acid is notable because it crosses the blood-brain barrier, which is why gotu kola has effects on the brain that most herbal supplements don’t.
Circulation and Leg Swelling
The strongest clinical evidence for gotu kola is in treating poor circulation in the legs, a condition called chronic venous insufficiency. People with this condition experience swollen ankles, heavy legs, and sometimes skin changes near the ankles.
In a controlled study of 40 patients with severe venous hypertension, taking a standardized triterpene extract (60 mg twice daily) for eight weeks significantly reduced ankle swelling and improved blood flow compared to placebo. A separate study of 52 patients found that both lower and higher doses (30 mg or 60 mg three times daily for four weeks) reduced ankle circumference and fluid buildup, with the higher dose producing greater improvement.
For people with diabetes-related circulation problems, six months of the same extract improved microcirculation significantly. After 12 months, patients saw a 38% improvement in venous response and roughly 28% less swelling in their extremities compared to placebo. These are meaningful, measurable changes for people dealing with daily discomfort from poor leg circulation.
Skin Healing and Scar Reduction
Gotu kola has a dual relationship with collagen that makes it useful for both wound healing and scar management. In healthy, healing tissue, its triterpenes stimulate collagen production, helping wounds close faster. Lab studies confirm that gotu kola extracts increase collagen synthesis while also boosting antioxidant levels at the wound site, both of which speed up repair of connective tissue.
In already-healed tissue where excessive scarring is the problem, the same compounds work differently. They inhibit overproduction of collagen, which is what creates raised, thickened scars called keloids. Clinical trials have found gotu kola extract helpful for both preventing and treating these enlarged scars after burns or surgical wounds. This makes it one of the few natural compounds with evidence for scar management on both ends of the healing process.
Memory and Brain Health
The cognitive benefits of gotu kola are real but modest based on current evidence. A double-blind trial of 28 healthy older adults found that 750 mg per day for two months improved both the speed and accuracy of working memory. Participants responded faster to memory tasks while also making fewer errors, a combination that suggests genuine cognitive improvement rather than a trade-off between speed and accuracy.
In stroke patients with cognitive impairment, gotu kola (750 or 1,000 mg daily for six weeks) improved delayed recall memory compared to a control treatment of folic acid. However, a 2017 meta-analysis of 11 randomized controlled trials found no significant overall difference between gotu kola and placebo across various cognitive measures. The takeaway: gotu kola may help with specific types of memory, particularly working memory and recall, but it’s not a broad cognitive enhancer.
The animal research paints a more compelling picture for long-term brain protection. In mouse models of Alzheimer’s disease, gotu kola extract reduced levels of the amyloid proteins associated with the disease, protected brain cells from amyloid toxicity, and promoted the growth of dendrites (the branching connections between neurons). In a Parkinson’s model, asiatic acid significantly reduced motor problems and prevented the loss of dopamine, the chemical messenger that deteriorates in the disease. These findings are promising but haven’t been replicated in human trials yet.
Anxiety and Stress
Gotu kola appears to reduce anxiety gradually over weeks rather than working as an immediate calming agent. In a trial of people with generalized anxiety disorder, 1,000 mg daily (split into two doses) reduced anxiety by 13.1% at 30 days and 26% by 60 days. Attention improved on a similar timeline, increasing 13.4% at one month and 27.8% at two months. A separate placebo-controlled study in healthy volunteers confirmed anxiolytic activity by measuring the acoustic startle response, a physiological reflex that’s heightened in anxious states.
The gradual, time-dependent pattern is worth noting. If you try gotu kola for anxiety, the first month may produce only subtle changes. The more noticeable effects appear to build during the second month of consistent use.
How Long Before You Notice Results
The timeline depends on what you’re using it for. Circulation improvements in clinical trials appeared within four to eight weeks. Anxiety and cognitive benefits follow a dose-dependent and time-dependent curve, with measurable changes at 30 days that roughly double by 60 days. For effects on nerve cell growth and connectivity, animal research suggests four weeks is the minimum, with older adults potentially needing six weeks at the same dose that works in four for younger people.
Dosage and Forms
Most clinical research on circulation uses a standardized triterpene extract at 60 mg, taken two to three times daily. This is a concentrated preparation, not the same as 60 mg of raw herb. Cognitive and anxiety studies have used higher doses of whole-plant extracts, typically 750 to 1,000 mg per day. The distinction matters when you’re comparing products: a standardized triterpene extract is far more concentrated than a basic dried-herb capsule.
Gotu kola is available as capsules, tinctures, teas, and topical creams. For skin healing and scars, both oral and topical forms have been used in studies. For circulation and cognitive benefits, oral forms are necessary.
Safety Concerns
Gotu kola is generally well tolerated at the doses used in research, but liver safety deserves attention. Herbal supplements as a category are increasingly recognized as a cause of liver injury, and some Ayurvedic herbs carry inherent hepatotoxic potential independent of contamination. While gotu kola is not among the most commonly reported offenders, cases of liver injury have been documented. People with existing liver conditions should be particularly cautious, as herbal formulations can worsen preexisting liver disease. Periodic liver function monitoring is reasonable for anyone using gotu kola long-term.
Gotu kola may also increase sensitivity to sunlight and can interact with sedative medications, since it has its own mild calming effects. Pregnant women should avoid it, as some of its compounds have been shown to affect fetal development in animal studies.