What Centella Actually Does
Centella asiatica — gotu kola, tiger grass, cica — is a plant extract rather than a single molecule, and its activity is attributed to a group of pentacyclic triterpenoid saponins: asiaticoside, madecassoside, asiatic acid and madecassic acid, collectively called centellosides. Those four are what the research is about. Everything else in a centella extract is along for the ride.
The claims that hold up are the modest ones. Centella calms visible irritation and redness. It supports barrier recovery after damage. It has a substantial wound-healing literature, including work on burns and on post-procedure skin, and it stimulates the synthesis of glycosaminoglycans and collagen in that healing context. For a plant extract, that is an unusually well-populated evidence base.
The claims that do not hold up are the ones the category has drifted into. Centella is not an acne treatment, though it is frequently sold as one because calmer skin looks like clearer skin. It is not a pigment treatment — if post-acne marks are the problem, azelaic acid or niacinamide is the tool. And it is not an anti-wrinkle active in the way a retinoid is, despite the collagen language that appears on the packaging.
Cica, TECA, Madecassoside: Reading the Label
This is where most of the confusion in the category lives. The same plant appears on ingredient lists under at least six different names, and they do not mean the same thing.
| On the label | What it is | What it tells you |
|---|---|---|
| Centella Asiatica Extract | The whole extract | Nothing about the triterpene content, which is not published |
| Centella Asiatica Leaf Extract | Extract from the leaf specifically | Same — the useful fraction is still unquantified |
| Madecassoside | One isolated triterpene | A defined molecule; the one most used in European pharmacy brands |
| Asiaticoside | Another isolated triterpene | A defined molecule, common in wound-care research |
| TECA | Titrated extract of Centella asiatica | A standardized fraction — the most meaningful thing on this list |
| Cica | Marketing shorthand | Nothing at all. Not an ingredient name. |
The practical consequence: a product listing an isolated triterpene or TECA is telling you something specific, and a product listing "Centella Asiatica Extract" high on the ingredient list is telling you only that some of the plant is in there. Neither is automatically better, but only one is a real disclosure.
Percentage and ppm figures deserve the same skepticism they deserve on snail mucin. A brand advertising a large ppm number is describing how much extract went in, not how much of the active fraction it carried, and extract potency varies by growing region, harvest and processing — none of which is published. Two products at the same stated percentage are two unknowns.
Forms
- Ampoule or essence. Watery, minimal, usually the closest you get to centella on its own. The best format for finding out whether the ingredient suits you.
- Cream or lotion. Centella plus a moisturizer base. Convenient, but the base does much of the work and you cannot separate the two.
- Repair balm. Occlusive, usually built on madecassoside with panthenol. The pharmacy-brand approach, and the format closest to the original wound-care use.
- Sunscreen and sun serum. A soothing addition to a sun filter; useful, but choose it on the sun protection first.
- Color-correcting treatment. Green-tinted makeup that cancels redness visually. It contains centella, but what you are buying is the pigment.
- With niacinamide or panthenol. Common and sensible pairings for barrier and redness work.
How to Use Centella
- Apply after cleansing, before heavier serums and moisturizer. Damp skin is fine.
- Use it morning and night if you like. There is no adjustment period and no photosensitivity.
- Follow with a moisturizer. Centella is a soothing agent, not an occlusive, and it holds nothing in by itself.
- Use it as the recovery layer around irritating actives — after a retinoid night, after an acid, after sun. This is where it earns its place.
- Give redness a month before judging. Irritation settles gradually and a week tells you nothing.
- Patch test anyway. Plant extracts are a more common source of contact allergy than lab-made actives.
One thing worth doing deliberately: if you are using centella because your skin is angry, stop adding things at the same time. The whole value of a soothing layer is that it lets you work out what was irritating you, and that only works if the rest of the routine holds still.
Who It Suits, and Who Should Skip It
Centella suits reactive and easily-reddened skin, skin recovering from over-exfoliation or a retinoid ramp-up, and anyone whose barrier is in worse shape than their complaints suggest. It is well tolerated, light, and unusually easy to add to a routine that is already crowded.
- If you want treatment, this is not it. Soothing and barrier support are the honest claims; acne, pigment and lines each have better tools.
- Plant-extract allergies are real. If botanical ingredients have caught you out before, an isolated triterpene is a safer bet than a whole extract.
- Persistent facial redness deserves a diagnosis, not a longer product list — see our rosacea guide.
- Eczema-prone skin will usually get more from an ointment-style balm than from a watery ampoule — the eczema guide covers why.
- If your routine is the problem, removing the irritant beats adding a soother. Centella cannot out-calm a daily acid.
Pairings and Conflicts
| Combination | Verdict |
|---|---|
| Centella + retinoid | Good. The standard buffering and recovery pairing. |
| Centella + niacinamide | Good. Complementary barrier and redness work. |
| Centella + acids | Fine. Apply the acid first, let it absorb, then soothe. |
| Centella + vitamin C | Fine. No interaction either way. |
| Centella + snail mucin | Redundant rather than harmful. Both are soothing hydrators. |
| Centella + a moisturizer on top | Necessary. Nothing here seals anything in on its own. |
There is no combination to avoid, which is part of why the ingredient spread so fast. The risk with centella is not a conflict; it is buying a fourth soothing product when the routine already had three and the actual irritant is still in it.
What the Evidence Actually Supports
Graded honestly, because the gap between the research and the marketing is wider here than for most ingredients:
| Claim | How well supported |
|---|---|
| Wound and burn healing | Strong for damaged skin, in both animal and human work |
| Post-procedure recovery | Supported, including a split-face randomized trial after laser resurfacing |
| Soothing visible redness | Reasonable, and consistent with the mechanism |
| Barrier support | Reasonable, largely extrapolated from the healing literature |
| Antioxidant activity | Demonstrated in lab and animal models; unclear what it means on a face |
| Acne treatment | Not supported. Calmer skin is not clearer skin. |
| Fading dark marks | Not supported as a pigment mechanism |
| Wrinkles | Not supported at the doses used in cosmetics |
That is a good record for a botanical. Most plant extracts in skincare have a handful of in-vitro papers and a marketing department; centella has a clinical literature in wound care that predates the skincare interest entirely. The honest position is to buy it for what that literature supports and to ignore the rest of the packaging.
