Centella asiatica has been in Korean skincare so long that most consumers know the name without knowing what is actually inside it. "Cica," "tiger grass," "centella," "heartleaf-adjacent" - these terms get used loosely, and brands lean on the centella label without always using the compound that makes centella work.

The compound is madecassoside. If you have been buying cica creams and getting inconsistent results, the likely reason is that the concentration of madecassoside is either unlisted or too low. Here is what it is, what it does, and how to find it on a label.

What centella actually contains

Centella asiatica is a herbaceous plant native to South and Southeast Asia, long used in traditional Indian and Chinese medicine for wound healing. Its active chemistry is a group of pentacyclic triterpenoids, collectively called "centellosides." The four important members are:

Asiaticoside: the most abundant in most centella extracts, with moderate wound-healing effects.

Asiatic acid: the aglycone (non-sugar-linked) form of asiaticoside, more lipophilic and slightly faster-acting.

Madecassoside: similar structure to asiaticoside but with different sugar groups. The best-studied for collagen synthesis and anti-inflammatory effects.

Madecassic acid: the aglycone of madecassoside, with strong anti-inflammatory action.

A typical centella extract contains all four, with asiaticoside at highest concentration. When a brand uses "standardized centella extract," the standardization usually sets a minimum total centellosides level (often 40 percent) but does not specify the ratio of individual compounds.

Madecassoside: a specific glycoside within centella, particularly effective for barrier repair, redness reduction, and collagen synthesis. See full entry.

Why madecassoside specifically

Three reasons madecassoside gets highlighted over its cousins.

The clinical evidence is strongest. A 2016 meta-analysis of centella-compound studies pulled 14 trials and found madecassoside had the most consistent effect sizes for erythema reduction and collagen III production. Asiaticoside was comparable on collagen but weaker on redness.

The safety profile is cleanest. Madecassoside has effectively no contact sensitization risk in published studies. Asiaticoside has occasional reports of mild sensitization in predisposed individuals.

The penetration is well-characterized. Madecassoside, despite its molecular weight, passes through the stratum corneum at useful rates when properly formulated. Lab studies show effective epidermal concentrations within 2 hours.

What madecassoside does on the skin

Anti-inflammatory

Madecassoside inhibits pro-inflammatory cytokines (IL-6, TNF-alpha) at the keratinocyte level. This is why it calms redness and is a staple in post-procedure recovery serums. The effect is comparable to low-dose hydrocortisone without the steroid side effects.

Collagen stimulation

Madecassoside upregulates Type I and Type III collagen production in fibroblasts. The effect is modest compared to retinol but real. Korean anti-aging serums often include madecassoside as a gentler supporting active.

Antioxidant

It scavenges reactive oxygen species, which reduces UV-induced oxidative damage when layered under sunscreen.

Wound healing

The original traditional use. Madecassoside accelerates re-epithelialization and improves scar quality. This is also why Korean brands recommend it for post-acne marks.

The concentration question

Published efficacy studies have used madecassoside at 0.1 percent to 1 percent. Most commercial products that list it disclose concentration in this range. Above 1 percent does not improve outcomes and may be destabilizing to the formulation.

Here is the trick Korean brands use. A product labeled "centella extract" at 5 percent might contain 0.05 percent madecassoside (too low to be effective) or 0.5 percent madecassoside (within the effective range). The difference depends on the extract standardization.

Products that explicitly list "madecassoside" separately on the INCI - not just "centella asiatica extract" - are almost always using isolated or heavily standardized madecassoside at meaningful concentration. This separate listing is the marker of quality.

Madecassoside versus other calming ingredients

Versus niacinamide

Niacinamide calms via a different mechanism (barrier support and microbiome regulation). The two stack well and are often combined in Korean calming serums.

Versus centella extract alone

Isolated madecassoside is more predictable than whole centella extract because you know exactly what compound is doing the work at what concentration. Whole extracts vary batch to batch.

Versus allantoin

Allantoin calms and promotes cell turnover. It is gentler than madecassoside but has less clinical evidence for collagen support.

Versus mugwort (Artemisia)

Mugwort has a different mechanism (antimicrobial and anti-itch) and is often used for acne-reactive skin. For the comparison, see mugwort versus centella.

How to read a madecassoside product label

Three positive markers:

"Madecassoside" listed separately on the INCI. Ideally in the top seven.

Concentration disclosed, between 0.1 and 1 percent.

Supporting ingredients that suit barrier repair - beta-glucan, niacinamide, panthenol, centella leaf water.

Two red flags:

"Madecassoside" mentioned on the front of the package but not on the INCI. This is trace-amount product masquerading.

Concentration claims like "10% madecassoside." This is outside published efficacy ranges and suggests misleading concentration math.

The best use cases

Post-procedure skin

After a laser, chemical peel, dermaplaning, or aggressive retinol session. Madecassoside at 0.5 percent with beta-glucan and panthenol is the standard Korean clinic recovery stack.

Reactive and rosacea-prone skin

Daily use in a serum or moisturizer reduces visible flushing over 8 to 12 weeks. Our rosacea-friendly Korean routine covers this in depth.

Canadian winter barrier repair

Layered into the barrier-repair routine during Canadian winter. Combines well with ceramide creams. See the barrier repair guide.

Early anti-aging for sensitive skin

For consumers in their late 20s who cannot tolerate retinol, madecassoside with peptides is a gentle collagen-supporting stack.

The Canadian buying consideration

Korean madecassoside serums imported through authorized Canadian retailers comply with Health Canada's Cosmetics Notification pathway. Grey-market products occasionally label madecassoside concentrations higher than the actual formulation.

Price range: $28 to $55 CAD for a 30 mL serum from major Korean brands. Concentrated ampoules with 1 percent madecassoside are closer to $45 CAD.

A practical starter pairing

If you are trying madecassoside for the first time, pair it with a ceramide moisturizer on top and a gentle cleanser below. Skip other actives for the first two weeks to see the isolated effect. After two weeks, reintroduce your usual serums. You should notice less redness and faster recovery from any minor irritation.

Bottom line

Madecassoside is the specific centella compound with the best clinical evidence. It is not an interchangeable synonym for "cica" or "centella extract" - it is an isolated glycoside. Korean brands that highlight it by name at disclosed concentration are formulating with intention. If your cica routine has been underwhelming, switching to a madecassoside-specific serum usually delivers the effect the label promised.