Gotu Kola (Standardized).
A centella extract measured against its marker triterpenes. Those compounds support collagen output in skin and vessel walls, and it's traditionally been used for calm attention.
Reviewed March 2026
- Category
- Herb
What Gotu Kola (Standardized) is, and what it does.
- Does it work
- Suits people who want a stated triterpene percentage on the label. Check which of the four markers that percentage refers to, because it changes what's actually in the capsule.
- How much to take
- Start with 250 to 500mg a day of the standardised extract, which is the daily maintenance band. The 1,000mg used in studies is a research condition, not a daily target.
- Time to feel it
- Two to four weeks for calm and attention; six to twelve weeks for skin and connective tissue, which move at the pace of collagen turnover.
- The first dose
- Quiet. The glycosides need gut bacteria to release the absorbable form, so day one is the start of a build, though some people notice a mild settling by evening.
- With regular use
- Weeks of daily use support collagen output in connective tissue and steady attention. Most of that shows up in how skin and legs behave rather than in a daily sensation.
- How well tolerated
- Well tolerated at everyday amounts, with occasional drowsiness or stomach upset. Check with a clinician first if you're pregnant, breastfeeding, or on liver-cleared medication.
- How it feels
- Mild and settling rather than energising. A few people feel a little drowsy, which is why some prefer taking it in the evening.
- The overlooked benefit
- The percentage on the label depends on which of the four triterpenes it was assayed against, so two products declaring the same figure may not be the same material.
60 to 120mg a day is where Gotu Kola (Standardized) works.
Source: Puttarak et al. 2017 J Ethnopharmacol review; Wattanathorn et al. 2008 J Ethnopharmacol (n=28 RCT).
The proof, claim by claim.
These words describe the research, not the molecule's worth. Research strength is how much work stands behind one claim, and it is never a product score.
Gotu Kola (Standardized) has emerging evidence. Based on 1790457+ studies.
- Collagen production in connective tissueIn vitro study
- Skin firmness and appearanceRandomised trial
- Comfort in tired, heavy legsRandomised trial
- Neurite outgrowth in cultured neuronsIn vitro study
- Memory and attention measuresRandomised trial
- Everyday stress and calmRandomised trial
Questions people ask about Gotu Kola (Standardized).
- When should I take it?
- Timing matters less than consistency. Pick a time that works for you and take it daily.
- Can I take it with other supplements?
- Usually fine. The main thing to watch is not doubling up on the same ingredient from different products. If you're on prescription meds, check with your pharmacist first.
- Any side effects to watch for?
- Most people tolerate it well at recommended doses. GI upset is the most common complaint with any supplement. Start with a lower dose and work up. If something feels off, stop and reassess.
Why these belong in the same formula. Each row says what the basis is, from settled biochemistry through to a trial that measured the pair.
Standardised centella extracts are dosed for asiaticoside and madecassoside, which drive collagen synthesis, and the hydroxylases that stabilise collagen require ascorbate. The pairing supplies the cofactor for the step the extract accelerates.
Collagen and elastin fibres are crosslinked by the copper dependent enzyme lysyl oxidase. Newly synthesised collagen needs copper to reach mature crosslinked structure.
Proline and its hydroxylated form make up roughly a quarter of collagen residues. Supplying the substrate alongside a synthesis stimulus is straightforward precursor pairing.
Lysine residues are the sites lysyl oxidase modifies to form collagen crosslinks. Adequate lysine is needed for the fibre network centella stimulates to hold together.
Hydrolysed collagen fragments act both as amino acid supply and as a signal to fibroblasts. Centella triterpenes push those same fibroblasts toward matrix production.
Hyaluronan forms the hydrated ground substance in which collagen fibres sit. Centella affects the fibre side of the same matrix, so the two components are complementary.
Zinc is required by matrix metalloproteinases and by the enzymes of normal tissue remodelling. Collagen turnover driven by centella depends on that zinc-dependent machinery.
Pine bark procyanidins bind to collagen and elastin and slow their enzymatic breakdown. Combined with a synthesis stimulus the pairing covers both production and protection.
Bacopa and centella sit in the same traditional group of herbs used for normal mental function, and act through different chemistry, bacosides against triterpenes. The combination is long-standing formulation practice.
Ginkgo acts on blood viscosity and platelet activating factor while centella acts on the vessel wall itself. Formulas pair a flow agent with a wall agent.
Theanine is a glutamate analogue that crosses the blood brain barrier on the large neutral amino acid transporter and shifts EEG alpha activity in human recordings. Centella is used in the same calm-focus category on traditional grounds. Alpha power is a marker rather than a cognitive outcome. The pairing is category convention with separate single-agent mechanisms.
Rhodiola is standardised to rosavins and salidroside and is used for perceived exertion and mental fatigue measures. Centella comes from a different tradition and a different chemical class. They are combined in adaptogen blends because their single-agent literatures do not overlap. No combination trial defines the pairing.
Withanolide-standardised ashwagandha and triterpene-standardised centella are both classical Ayurvedic medhya rasayana herbs and appear together in traditional formulas. Their modern standardisation markers are unrelated chemical classes. The pairing carries traditional authority and separate modern single-agent work, not combination trial data.
Hericium compounds increase nerve growth factor expression in cultured cells, and centella extracts have been described as affecting neurite outgrowth in similar cell systems. Both lines are cell-culture pharmacology. Combining them stacks two preclinical rationales rather than two clinical results, and copy should say so.
Alpha-glycerophosphocholine delivers choline that is acetylated by choline acetyltransferase to make acetylcholine, and choline availability is a limiting input to that synthesis. That is a different lever from anything attributed to centella triterpenes. Products combining them are covering substrate supply and a separate botanical rationale.
Phosphatidylserine is a structural phospholipid concentrated on the inner leaflet of neuronal membranes, where it participates in protein kinase C docking and membrane signalling. Its role is structural and it is a normal dietary component. It sits alongside centella in cognitive blends as a membrane input rather than a signalling one.
Huperzine A is a reversible acetylcholinesterase inhibitor, so it slows breakdown of released acetylcholine. That is a potent and well-characterised pharmacological action, which is why cycling and dose care are discussed for it, and why anyone taking cholinergic medication needs to account for it. Combining it with a botanical like centella stacks a defined enzyme inhibitor with an undefined one.
Oligomeric proanthocyanidins bind to collagen and elastin fibres in vitro and are studied for capillary resistance measures. Centella acts on the synthesis side in fibroblasts. Together they cover synthesis and fibre stabilisation, which is why both appear in connective tissue formulas. The combination rests on complementary mechanisms rather than on a trial.
Silicon is found associated with glycosaminoglycans and at collagen cross-linking sites in connective tissue, and orthosilicic acid is the absorbable form. A human requirement for silicon has not been established. Its inclusion beside centella is compositional reasoning.
Manganese is the cofactor for the glycosyltransferases that assemble glycosaminoglycan chains on proteoglycan cores, part of the same connective tissue matrix that collagen sits in. It also serves mitochondrial superoxide dismutase. Manganese has a narrow intake range and is easy to over-supply across stacked products, which is worth stating alongside the cofactor role.
Asiatic acid and madecassic acid are poorly water soluble once the sugar is cleaved from the parent glycoside. A lipid phase in the same meal supports dispersion and micellar uptake. Some standardised products are supplied as an oil suspension or a phospholipid complex for the same reason.
Alpha-tocopherol chain-breaks lipid peroxyl radicals in membranes and in the carrier oil of an oil-suspended extract, which is why it appears in both the formula and the packaging strategy. Vitamin C regenerates the tocopheroxyl radical back to tocopherol, so the two work as a redox pair. The relationship is chemical rather than centella-specific.
Prolyl 4-hydroxylase and lysyl hydroxylase are iron-dependent dioxygenases that require ascorbate to keep the active-site iron reduced. Without both, procollagen chains fail to form a stable triple helix at body temperature regardless of how much transcription is signalled. This is why iron and vitamin C status sit underneath any collagen-directed ingredient. Supplemental iron is only relevant where status is genuinely low.
Nothing specific on file for Gotu Kola (Standardized). Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.What Gotu Kola (Standardized) actually does.
Centella asiatica is characterised by four pentacyclic triterpenes: asiaticoside and madecassoside as glycosides, and asiatic acid and madecassic acid as their aglycones.
A standardisation percentage on a centella label depends on which of the four triterpenes it is assayed against, so two products declaring the same figure may not describe the same material.
The triterpene glycosides require hydrolysis, partly by gut microbial glycosidases, before their aglycones enter circulation, so the compounds measured in plasma are not the compounds listed on the label.
Collagen synthesis requires ascorbate-dependent, iron-containing prolyl and lysyl hydroxylases, and copper-dependent lysyl oxidase for cross-linking, so a transcriptional signal still depends on those cofactors being present.
Where Gotu Kola (Standardized) comes from.
The leaves and stems are dried, ground and soaked in an alcohol and water mix that pulls out the active plant compounds. The liquid is filtered and boiled down under vacuum, then tested on a machine that measures exactly how much of the marker compounds it holds, so the label can state a percentage. That concentrate goes into capsules, tablets or a dropper bottle.
Made from a plant. What ends up in the capsule tracks the harvest, so batch testing and a stated marker matter more here than with a made molecule.
Leaf and stem from cultivated or wild-collected plants in South and Southeast Asia, Madagascar and Sri Lanka; the plant grows in wet ground, so source water quality and heavy metal load are release considerations.
Aerial parts are dried to a target moisture and milled; drying temperature affects which triterpenes survive intact into the extract.
Ethanol and water pull the triterpene glycosides and aglycones from milled plant material; solvent ratio and temperature shift which of the four dominates.
The extract is filtered, concentrated under vacuum, and for titrated grades passed through further separation to enrich the triterpene fraction against the rest of the extract.
Material is assayed and blended with carrier or lower-assay extract to hit the declared percentage; because suppliers title against different combinations of the four triterpenes, the same declared number can describe different material.
Dry extract is encapsulated or tabletted; the phospholipid complex is formed in a separate step and dried; liquid extract is bottled with ethanol content declared.
Labels commonly state a triterpene percentage without saying which of the four compounds it was measured against, and the country of cultivation is usually absent.
The forms it comes in.
The essence, in one line each.
- A standardised Centella asiatica extract (CA-HE50) taken daily over an extended period was tested against placebo on cognitive performance measures and was well tolerated.Randomised trial. Baek et al., 2026 (Nutrients). PMID 41901080 ↗
- Gotu kola supplementation was compared with a multivitamin and showed more favourable shifts in markers of oxidative stress and inflammation, with cognitive test differences smaller and less consistent.Randomised trial. Phoemsapthawee et al., 2022 (Journal of exercise rehabilitation). PMID 36420467 ↗
- A systematic review and meta-analysis of dietary patterns and cognitive test performance that names centella among the dietary components discussed; the relationships pooled are associations rather than demonstrated causes.Meta-analysis. Amanat et al., 2025 (Advances in Nutrition). PMID 40355028 ↗
These are the studies our verdict leans on, chosen from the 60 we read for Gotu Kola (Standardized). The full linked list is below.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.