Centella asiatica — sold as cica, gotu kola, or tiger grass — is a marsh plant whose extract calms irritated skin and supports wound healing. Of all the ingredients marketed as "soothing," it has the most substantial body of research behind it, including clinical use in wound care that long predates its arrival in serums. If your skin is red, over-exfoliated or recovering from something, this is a genuinely reasonable ingredient to reach for.
What it is not is an active. Centella does not exfoliate, does not resurface, does not fade pigment and does not treat acne. It calms and it supports repair. That is a real and useful job — most people's skin problems are downstream of irritation, and the barrier-first approach this site takes has calming at its center — but it is a supporting role.
The four compounds that do the work
Centella extract contains four principal actives: asiaticoside, madecassoside, asiatic acid and madecassic acid. The first two are the ones you see on labels. Asiaticoside is associated with collagen synthesis and wound healing in the published work; madecassoside is the more anti-inflammatory of the pair and is the compound premium formulas tend to isolate and name specifically.
Practically, this means labels are worth reading. "Centella asiatica extract" is the whole-plant extract, which contains all four in unstated proportions. "Madecassoside" or "asiaticoside" named separately means the formulator has isolated the compound — more precise, usually more expensive, and not automatically better for general soothing. For most purposes the whole extract is fine, and a product with centella high in the list beats a product with an isolate buried at the bottom.
What the evidence supports, and where it stops
Reasonably supported: reduced redness and irritation, faster recovery of a compromised barrier, and use as a supportive treatment in wound care. This is the strongest position of any "calming" botanical, and it is why centella turns up in post-procedure products recommended by dermatologists.
Not well supported: the anti-aging and collagen-building claims that appear on a lot of cica packaging. The collagen work is largely in wound-healing contexts and in laboratory models, and extrapolating from "helps a wound close" to "reduces your wrinkles" is a leap the data does not make. If your goal is aging, a retinoid and sunscreen are the evidence-backed answers — see our anti-aging roundup.
When to reach for it
- After over-exfoliating — this is the best use. Centella plus a bland moisturizer is a sensible barrier-recovery routine; the full protocol is in our damaged skin barrier guide.
- Alongside a new retinoid — using a centella product on the nights you are not applying the retinoid takes the edge off the adjustment period.
- On generally reactive or rosacea-prone skin — as a daily calming layer. It will not treat rosacea, but comfort has value.
- After sun, shaving or a procedure — the traditional use, and the one with the most support behind it.
Cica versus niacinamide versus azelaic acid
All three are recommended for redness and they are not interchangeable. Niacinamide supports barrier lipid production and moderates oil — more structural, slower, useful daily. Azelaic acid is a genuine anti-inflammatory active with evidence in rosacea and acne — the strongest of the three, and the one with actual treatment claims. Centella is the pure comfort option: fastest to feel, least likely to irritate, no treatment claim at all. Reactive skin often does well on centella plus niacinamide together.
Buying notes
Two flags worth knowing. First, a lot of cica products are heavily fragranced, which is an odd choice for something sold to calm reactive skin — check the list. Second, the percentage claims on Korean cica packaging ("77% centella," "100% cica") usually refer to the proportion of the water phase replaced with extract, not to active compound concentration. It is not dishonest, but it does not mean what most people read it to mean.
