What Is Centella Asiatica (Cica), and What Does It Actually Do for Skin?

Centella asiatica, the plant most skincare labels shorten to "cica", is a small creeping herb whose extract is added to creams and serums for one well-supported reason: on skin that is already irritated, it appears to calm redness and improve how well the surface holds onto moisture. That is a real and useful effect, but it is a narrower one than the wording on many product pages implies. The plant contains four triterpene compounds that increase collagen and speed wound healing in laboratory and animal studies, and two controlled human trials back up a comfort-and-redness effect on already-stressed skin. What has not held up as well in controlled testing is centella doing much for a chronic inflammatory skin condition on its own, and nothing here supports it reversing ageing skin structurally. The sections below explain where each claim comes from and how much weight it can actually carry.

• Centella asiatica (cica) is a plant, not a synthetic ingredient; "cica" is simply the skincare-industry shorthand for it, popularised through Korean marketing.
• Four compounds, asiaticoside, madecassoside, asiatic acid and madecassic acid, are usually credited for its effects, and most of that evidence starts in laboratory and animal work rather than on human skin.
• Two controlled human trials found centella-based products significantly improved skin-barrier hydration and reduced redness on skin that was already irritated, from repeated chemical exposure in one trial and from laser resurfacing in the other.
• A separate trial on a centella-containing ointment for atopic dermatitis found no statistically significant benefit over the same base cream without it.
• In Quintéa's own hairline-comfort use case, centella's job is calming reactive skin during a drying treatment, not treating the scalp or growing hair.

What Centella Asiatica Actually Is

Centella asiatica is a creeping perennial herb in the Apiaceae family, the same botanical family as parsley and carrots, and it grows wild in wet, tropical parts of Asia, Africa and the Pacific. It also goes by gotu kola and Asiatic or Indian pennywort, names that turn up on supplement labels more often than on skincare ones (source: Centella asiatica, Wikipedia). Long before it reached a jar of moisturiser, it had a long history in Ayurvedic and traditional Chinese medicine, where crushed or dried leaves were applied to wounds and various skin complaints.

"Cica" is not a different substance or a proprietary complex layered on top of the plant extract. It is simply the abbreviation that Korean skincare marketing popularised for Centella asiatica, so a "cica cream" and a "centella cream" are describing the same ingredient under a shorter name.

The Four Compounds Usually Credited for Its Effect

When a source explains why centella might do anything for skin, it usually points to four related compounds: asiaticoside, madecassoside, asiatic acid and madecassic acid. These belong to a group called pentacyclic triterpenes, and the plant contains roughly 124 identified chemical compounds in total, with these four singled out as the ones most consistently studied for a biological effect (Centella asiatica, Wikipedia).

These four compounds are commonly credited with stimulating collagen production and helping wounds and burns heal, a reputation that owes more to how the underlying chemistry is expected to behave than to a specific study showing that effect in skin. A review of the evidence by Cleveland Clinic lists stimulating collagen and helping wounds and burns heal among the claims commonly made for cica products, from moisturising reactive skin to supporting collagen, but pairs that list with a direct caveat: "there aren't as many studies out there as you might expect," and the research behind any anti-ageing claim specifically is described as needing more work before it counts as settled. The gap worth noticing is that a plausible mechanism is not the same as a cell culture or animal study that actually measured collagen output or wound closure, and no source in this article's evidence pack presents that specific experiment.

What Human Trials Actually Show

Two controlled human trials give a clearer picture of what centella does once it is on real skin, and both point in the same direction.

A 2021 double-blind trial gave 30 Indonesian batik workers, whose hands are repeatedly exposed to dye and irritant chemicals on the job, either a centella asiatica cream or a ceramide cream, with each worker receiving only one, and tracked hydration over four weeks. Both creams significantly improved corneometer hydration readings from baseline, centella on the palm (p=0.007) and the back of the hand (p=0.001), and the trial found no significant difference between how well the two creams worked (Anggraeni et al., 2021). That is a narrower result than a no-treatment comparison would give: it shows centella performing about as well as an established barrier ingredient on already-irritated skin, not that it beat doing nothing.

A 2020 split-face trial took a different approach: 30 people recovering from laser resurfacing had a standardised centella extract gel applied to one side of the face and a placebo gel to the other, so each person acted as their own control. The centella-treated side ended up with a significantly lower erythema, or redness, index than the placebo side, alongside better-rated wound appearance (Damkerngsuntorn et al., 2020).

Read together, these two trials support a specific and fairly modest claim: on skin that is already irritated, whether from repeated chemical contact or a recent procedure, centella measurably helps with hydration and redness within weeks. Neither trial tested centella on skin that was simply ageing or ordinarily dry, so that broader claim is not what this evidence is about.

Where the Evidence Is Thinner Than the Marketing Suggests

The two trials above are the strongest evidence behind centella, and it is worth being just as clear about where that evidence runs out.

A 2007 trial randomised 88 adults with mild-to-moderate atopic dermatitis to a herbal ointment containing centella asiatica alongside Mahonia aquifolium and Viola tricolor, applied to one side of the body, with the plain base cream applied to the other side, over four weeks. The active ointment reduced symptoms only slightly more than the base cream on its own, and the overall difference between the two sides was not statistically significant (Klövekorn et al., 2007). That result does not prove centella has no effect on eczema-prone skin, but it does mean a formula containing it failed to clearly beat a plain moisturising base in this particular trial.

Three patterns are worth watching for when a product page cites "clinical studies" for centella. Most of the positive trials test a cream or ointment with several active ingredients at once, which makes it genuinely hard to credit centella specifically rather than the formula as a whole. Sample sizes across this research tend to sit around 30 to 90 people, a normal size for cosmetic studies but a far smaller evidence base than a drug approval would require. And a number of these trials are run or funded by the company selling the formula being tested, which does not invalidate the results but is worth knowing when deciding how much weight to give them.

Put plainly, "well tolerated and mildly calming on skin that is already irritated" is supported by the trials above. "Clinically proven" used as a blanket anti-ageing or acne-fixing claim is not supported by that same body of evidence, even though both phrases often sit on the same product page.

Who Should Be Careful, and How to Patch-Test

Centella is generally well tolerated, and serious reactions are uncommon, but contact dermatitis and localised irritation from topical use are reported (Centella asiatica, Wikipedia). A simple patch test catches most of these before they become a visible problem: apply a small amount to the inner arm and leave it alone for at least 24 hours before using the product on your face, a precaution Cleveland Clinic recommends specifically because rare reactions can include a burning sensation or dermatitis.

One caution that tends to get mixed up with this: concerns about liver effects from centella relate to taking it orally, as an ingested supplement, over a period of weeks, and they describe a different exposure altogether from applying a cream to your face. It is worth knowing that caution exists for the supplement form, but it has no bearing on whether a topical centella cream is reasonable to use.

Where This Fits in a Reactive-Skin Routine

The scalp and the face are one continuous piece of skin, which is why hairline irritation so often appears at the exact border where a topical hair-loss treatment sits. A minoxidil solution carried in propylene glycol, or a tretinoin-containing product like the Minoxidil Signature Spray, commonly leaves the hairline, temples and forehead red, tight and stinging somewhere between week two and week six of use. If that overlap is what brought you here, how the timing of a moisturiser fits around a minoxidil routine covers the sequencing question directly.

Quintéa sells three creams that do three different jobs, and it helps to know which one a centella product actually replaces. The Face Hydration Cream is the everyday option for skin that is simply dry. The Ceramide Barrier Cream replaces the lipids a solvent such as propylene glycol strips out of the skin, which is the slower, structural fix. The Centella Calming Cream is for the days when skin is actively angry: pink, tight and stinging as soon as anything touches it. Anyone weighing these options for reactive or sensitised skin more broadly may find this guide to choosing a moisturiser for skin irritated by a topical treatment useful for the wider decision.

None of this changes hair count, density or shedding, and continued use will not change that either; growing hair was never the job here. The actual job is keeping the skin around a treatment comfortable enough that someone keeps applying the treatment itself, which is a narrower and more honest claim than most cica marketing makes, and one the trials above genuinely support. For anyone comparing centella with other actives in a wider routine, how hyaluronic acid behaves on skin and what peptides such as GHK-Cu are credited with doing cover the two ingredients it most often ends up paired with.