Centella Asiatica in K-Beauty: What Cica Actually Is, What the Studies Show, and How to Use It

Cica is a nickname, not a single ingredient — the label details matter more than the leaf on the jar.

Your skin feels reactive, and every second K-beauty jar says "cica" — but what is it?

If your skin flushes easily, stings at new products, or never quite calms down after a breakout, you have probably been handed a cream with a green leaf on it and the word "cica" in large letters. Cica is everywhere in Korean skincare, presented as the gentle answer to irritated skin. The marketing is soothing. The obvious question is whether anything real sits underneath it.

Here is the short version. Cica is the nickname for Centella asiatica, a plant long used in traditional Asian medicine, also called gotu kola or tiger grass. Its best-studied compounds are four triterpenes: asiaticoside, madecassoside, asiatic acid, and madecassic acid. Laboratory and small human studies support a gentle, barrier-supporting, comfort-focused role — one small study of 25 volunteers found formulas with 5% centella extract improved hydration and reduced transepidermal water loss over four weeks — but the human evidence is limited, extracts are not standardized between products, and a cica cosmetic is not a treatment for eczema, acne, rosacea, or wounds. Sources: peer-reviewed reviews of centella in dermatology and cosmetology, cited at the end.

What exactly is centella asiatica?

A plant with four compounds worth knowing

Centella asiatica is a small creeping plant native to wetlands in Asia. "Cica" comes from the Latin name, and brands use it loosely: one product's "cica" might be a high percentage of centella extract, while another's is a trace of a single purified compound. That is why the ingredient list matters more than the front of the jar. The four compounds researchers focus on are asiaticoside and madecassoside (the glycosides, often highlighted in Korean products) and their partner acids, asiatic acid and madecassic acid. When a label lists madecassoside by name, you are at least seeing one defined compound rather than an undefined extract.

Why do Korean brands love it?

Centella fits the direction Korean skincare has moved for a decade: barrier-first, low-irritation formulas designed to be layered daily, including alongside strong actives like retinoids and exfoliating acids. A soothing step that does not fight with the rest of the routine is commercially and practically useful. Traditional use for wound care gave the ingredient its story — the "tiger grass" nickname comes from the legend of tigers rolling in the plant — but a traditional story is a starting point for research, not a substitute for it.

What does the research actually show?

Hydration and barrier support: the clearest human data

The most concrete human numbers come from a small study in which 25 volunteers applied creams and gels containing 2.5% and 5% centella extract to their forearms twice a day for four weeks. The 5% formulas increased the water content of the outer skin layer by about 25% (cream) and 22% (gel), and reduced transepidermal water loss — water escaping through the skin — by about 18% and 15%. On skin patches deliberately reddened for the test, centella formulas reduced redness more than untreated and placebo areas. The formulas were also well tolerated in patch testing.

Read that study the way a scientist would: 25 people, forearms rather than faces, healthy skin, four weeks. It supports "helps skin hold water and feel calmer" — it does not prove anything about diagnosed skin conditions, scars, or long-term facial use.

Soothing and repair: promising, mostly preclinical

Reviews of centella in skin disease describe real pharmacological activity for its triterpenes in laboratory and animal work — effects on inflammatory signalling and on fibroblasts, the cells that build connective tissue. Wound-healing research, including a systematic review, found potential benefit but with varied preparations and study quality. A 2021 review concluded plainly that longer, well-controlled clinical trials are still needed. In honest terms: the mechanism is plausible, the lab work is encouraging, and the large human trials that would settle the question have not been done.

Key points at a glance

• Cica = Centella asiatica (gotu kola, tiger grass)
• Key compounds: madecassoside, asiaticoside, asiatic acid, madecassic acid
• Human evidence: small studies; hydration and comfort are the best-supported effects
• Extracts are not standardized — check the ingredient list, not the leaf logo
• A cosmetic is not a treatment for eczema, acne, rosacea, or wounds
• Patch test first: allergic contact dermatitis is uncommon but documented

Cica works best as the calm middle step of a routine — after cleansing, before heavier cream.

How do you use cica in a routine?

Where it fits, step by step

• Cleanser: Gentle, low-stripping. If your face feels tight after washing, the cleanser is the first suspect, not the missing cica cream.
• Toner or essence (optional): Light hydration layers. Many Korean cica products live here as watery toners for sensitive-feeling skin.
• Cica serum or ampoule: The most concentrated common format. Apply to slightly damp skin.
• Cica cream: The barrier-supporting step. In winter or after an active-heavy night, this is where most people notice the comfort difference.
• Sunscreen (morning): Always last in the morning. No soothing ingredient substitutes for sun protection.

Pairing it with actives

Cica's popularity alongside retinoids and exfoliating acids is practical: on nights when a retinoid leaves skin feeling warm or tight, a plain cica cream is a reasonable comfort layer, and many people use it on "rest nights" between active nights. What cica cannot do is cancel out over-exfoliation. If your skin is stinging, peeling, and reactive, the fix is to pause the actives — cica is a companion to a sensible routine, not a rescue service for a damaged barrier.

Who should patch test, and who should ask first?

Allergic contact dermatitis to centella is uncommon but well documented in the literature, and a burning sensation on application is reported by some users. Patch test a new cica product on a small area for several days before full use, as you would with any new leave-on product. If you are pregnant or breastfeeding, note that safety data for isolated centella compounds in skincare is limited — a quick question to your clinician is the sensible route before starting a new product.

How do you choose a cica product without wasting money?

Read the back, not the front

• Look for named compounds (madecassoside, asiaticoside) or a stated centella extract position high in the ingredient list.
• Be skeptical of a product that shouts "cica" on the front but lists centella near the very end, after fragrance.
• If fragrance irritates your skin, choose a fragrance-free formula; "soothing" on the front does not guarantee it.
• Buy one product, use it for three to four weeks, and judge by comfort and hydration — the outcomes the evidence actually supports.

The Harnay Cicaide Cream Mist — a centella mist format reviewed in the shopping note below.

A centella pick available to Canadian readers

If you want to try the format in this guide, one current example on Olive Young Global is The Harnay Cicaide Cream Mist 120ml, built around a soothing complex of Centella Asiatica Extract, Madecassoside, and Tea Tree Leaf Extract, with Ceramide NP. Based on the official product information:

What works well

• The ingredient list names the actual cica compounds — centella extract plus madecassoside — rather than relying on the word "cica" alone
• Mist format makes it an easy comfort layer over or under cream, including during the day
• Includes Ceramide NP, a standard barrier-supporting ingredient, alongside the botanical complex

What to keep in mind

• It contains fragrance components including lime oil and lavender oil, so very fragrance-sensitive readers may prefer a fragrance-free cream instead
• As with all cica cosmetics, expect comfort and hydration support — not treatment of a skin condition

Shopping note for Canadian readers: This link is for Olive Young Global, which ships to Canada from Korea by FedEx — delivery typically takes 8–11 days, shipping is free on orders over US$60, and orders over CA$20 may be subject to tax on delivery. Olive Young Global does not currently ship to the United States through this store. You can shop it here: Olive Young Global — and the reward code VITAGUIDE1 gives 5% off (cannot be combined with other coupons; the larger discount applies). This section contains an affiliate link, and I may earn a commission if you buy through it, at no extra cost to you.

The bottom line

Centella asiatica is one of the better-researched botanical ingredients in K-beauty, and also one of the most loosely marketed. Used with realistic expectations — comfort, hydration support, a calmer-feeling routine — it earns its place, especially for sensitive-feeling skin and as a companion to stronger actives. Judged as a cure, it will always disappoint, because the studies were never claiming that in the first place.

Related reading on this blog: Toner Pads Explained: How to Use Them Without Over-Exfoliating | Korean Collagen Masks Explained
Version française : La centella asiatica en K-beauty

Do you reach for cica as an everyday step, or only on the nights your skin feels reactive? Tell us in the comments. Follow this blog to catch new K-beauty ingredient guides as soon as they are published — you can follow from the sidebar widget.

This article is general information only and is not medical advice. Cosmetics do not diagnose, treat, or prevent any disease or skin condition. If you have a persistent or diagnosed skin concern, see a health care professional.

Sources: Park KS, Pharmacological Effects of Centella asiatica on Skin Diseases, Evidence-Based Complementary and Alternative Medicine (2021); Ratz-Łyko et al., centella extract formulation study (25 volunteers, 2.5% and 5% formulas, four weeks); Arribas-López et al., Systematic Review of Centella asiatica on Wound Healing (2022); Olive Young Global official product page for The Harnay Cicaide Cream Mist 120ml (ingredients and product facts).