Cica is everywhere. Walk through any K-beauty aisle and you'll find serums, creams, patches, and sheet masks all proudly listing Centella Asiatica Extract. The plant has become skincare shorthand for soothing, barrier repair, and sensitivity — and for good reason: the clinical research on centella compounds is substantial and spans decades.
But here's what most cica products don't tell you: "Centella Asiatica Extract" is not a single active ingredient. It's a whole-plant extract containing hundreds of compounds, including four specific triterpenoid molecules that are responsible for most of the plant's documented skin benefits. The concentration and ratio of those four triterpenoids varies depending on the plant source, harvest season, and extraction method — making generic centella extract a product of variable and often limited potency.
Isolating those four compounds individually — as distinct INCI entries rather than one generic extract — represents a meaningful step forward in how centella can be formulated.
What Are Centella Triterpenoids?
Centella asiatica is a small creeping herb that grows throughout tropical and subtropical Asia, Africa, and parts of Australia. You may know it as gotu kola, tiger grass, Indian pennywort, or simply "cica" (derived from the French word "cicatrice," meaning scar — a nod to centella's wound-healing heritage).
The plant has been used in Ayurvedic, traditional Chinese, and Korean (Hanbang) medicine for centuries, primarily for wound healing, skin diseases, and cognitive function. Modern research has isolated the plant's primary active compounds — the pentacyclic triterpenoid fraction — and established which molecules are doing the therapeutic work.
The four key triterpenoids are:
- Madecassoside
- Asiaticoside
- Asiatic Acid
- Madecassic Acid
Together with minor compounds and the whole-plant extract base, these four form what cica devotees have come to love. But each plays a distinct role.
The Four Compounds: A Breakdown
Madecassoside — The Barrier Rebuilder and Anti-Inflammatory Anchor
Madecassoside is the most studied of the four triterpenoids and arguably the most therapeutically potent. Its primary mechanism of action is inhibition of the NF-κB (nuclear factor kappa B) signaling pathway — one of the central regulators of inflammatory gene expression in human cells. By suppressing NF-κB activation, madecassoside reduces the production of pro-inflammatory cytokines (IL-1β, TNF-α, IL-6) that drive the inflammatory cascade underlying everything from acne redness to post-procedural irritation.
Beyond anti-inflammation, madecassoside promotes fibroblast activity — the cells responsible for producing collagen and other extracellular matrix proteins. Clinical studies have shown it stimulates type I collagen synthesis, improving skin firmness and supporting the structural repair of barrier-compromised skin.
Madecassoside was first isolated and studied in the context of clinical wound care, including burn treatment. Its transition from hospital wound dressings to K-beauty formulations mirrors the PDRN story — clinic-born, consumer-adopted.
Asiaticoside — The Collagen Catalyst and Penetration Enhancer
Asiaticoside has a unique dual role: it promotes collagen synthesis directly while also functioning as a penetration enhancer that helps other centella compounds cross the stratum corneum more effectively.
On collagen: asiaticoside stimulates fibroblast proliferation (increasing the number of collagen-producing cells) and upregulates the expression of type I and type III collagen genes. Research by Maquart et al. found that triterpenes from centella, including asiaticoside, significantly stimulated extracellular matrix accumulation in experimental wound models. This collagen-synthesis effect complements madecassoside's barrier and anti-inflammatory work.
As a penetration enhancer, asiaticoside temporarily modifies the lipid organization of the stratum corneum, allowing other compounds — including madecassoside, asiatic acid, and madecassic acid — to penetrate more deeply than they would alone. This synergistic relationship is one reason why formulas using individual triterpenoids as distinct entries tend to outperform equivalent concentrations of generic extract.
Asiatic Acid — The Anti-Inflammatory Precision Tool
Asiatic acid is the free acid form corresponding to asiaticoside (which is asiatic acid bound to a sugar moiety). Without the sugar, asiatic acid penetrates the skin more readily and delivers more potent anti-inflammatory activity per molecule.
Like madecassoside, asiatic acid inhibits NF-κB signaling — but with greater potency in anti-inflammatory assays. It also demonstrates antioxidant activity, neutralizing reactive oxygen species that contribute to oxidative skin stress and accelerated aging. For sensitive, reactive, or post-treatment skin, asiatic acid's combination of targeted anti-inflammatory and antioxidant effects makes it a valuable inclusion at even trace concentrations.
Madecassic Acid — The Barrier Synergist
Madecassic acid is the free acid form corresponding to madecassoside (which is madecassic acid bound to a sugar). The relationship between these two mirrors asiatic acid and asiaticoside: the free acid form is more lipophilic and may penetrate differently, while the glycoside form (with attached sugar) offers improved water solubility.
Madecassic acid supports barrier function and works synergistically with madecassoside — the combination of the two appears more effective for barrier restoration than either alone. It has been less extensively studied as an isolated compound, but its presence in a four-compound centella formula completes the triterpenoid picture and likely contributes to the overall barrier-rebuilding effect.
Extract vs. Isolated Compounds: Why It Matters
Most cica products list "Centella Asiatica Extract" as a single ingredient. This extract contains all four triterpenoids, but:
| Generic Centella Extract | Isolated Triterpenoids | |
|---|---|---|
| Triterpenoid concentration | Variable (depends on plant source and harvest) | Controlled and specified |
| Compound ratios | Unpredictable | Each compound at defined level |
| Potency | Inconsistent batch to batch | Consistent |
| INCI transparency | One line: "Centella Asiatica Extract" | Four separate INCI entries |
| Formulation precision | Limited | High |
Listing each triterpenoid as a separate INCI ingredient means each is present at a deliberate concentration — it's not incidental. This is an analogous upgrade to using isolated active vitamins versus a generic botanical blend: you gain predictability, precision, and transparency.
What the Science Says
The clinical research on centella triterpenoids is substantial. Key findings across peer-reviewed studies:
- Wound healing: Centella triterpenoids have been shown to accelerate wound healing in multiple clinical models, including post-surgical and burn wounds, primarily through collagen stimulation and anti-inflammatory mechanisms
- Barrier repair: Madecassoside in particular has demonstrated significant improvements in transepidermal water loss (TEWL) and stratum corneum integrity in damaged skin models
- Collagen production: Asiaticoside and madecassoside both independently stimulate fibroblast activity and collagen gene expression
- Anti-inflammatory efficacy: Asiatic acid and madecassoside both inhibit NF-κB at relevant concentrations, with meaningful reductions in inflammatory markers in cell and animal studies
Who Should Use Products with Centella Triterpenoids?
Centella triterpenoids benefit a wide range of skin types and concerns, but are particularly well-suited for:
- Post-blemish skin: Barrier repair and anti-inflammatory action support recovery after inflammatory acne
- Sensitive and reactive skin: The anti-inflammatory mechanisms calm reactivity without steroid-associated side effects
- Compromised or damaged barrier: Madecassoside and madecassic acid directly support barrier lipid synthesis and TEWL reduction
- Post-procedural skin: Clinical wound-healing origins make centella compounds ideal after chemical peels, laser treatments, or microneedling
- Aging skin: Collagen-stimulating effects from asiaticoside and madecassoside support firmness and elasticity
How to Use Centella Triterpenoids in Your Routine
Centella compounds are stable and can be used both morning and evening. They pair well with:
- Niacinamide: Complementary barrier and anti-inflammatory effects
- Ceramides: Reinforces barrier-repair action
- Hyaluronic acid: Combines barrier support with hydration
- Zinc PCA: Both are anti-inflammatory and barrier-supporting; useful for blemish-prone skin
Avoid known irritants like high-percentage AHAs or undiluted retinol in the same application — not because centella is incompatible, but because the barrier-sensitizing effects of those actives undermine centella's repair work.
The Cica Evolution: From Clinic to K-Beauty
Centella asiatica entered dermatological medicine in the mid-20th century, when researchers in France and Asia began isolating and standardizing the triterpenoid fraction for use in wound care products. The plant's traditional uses in Hanbang medicine and Ayurveda had pointed to these properties for centuries; clinical science then confirmed and built on them.
K-beauty began mainstreaming cica in the 2010s, initially through masks and creams marketed primarily to sensitive and post-acne skin. The category matured quickly. Early cica products used generic centella extract; more recent formulations began specifying madecassoside content; the leading edge now isolates all four triterpenoids individually.
Understanding the difference between "has centella" and "has isolated madecassoside, asiaticoside, asiatic acid, and madecassic acid" is the difference between reading a label and reading a formula.
For more on centella asiatica as a plant — its history, traditional uses, and how it became a K-beauty cornerstone — see our Centella Asiatica Complete Guide.
Frequently Asked Questions
Is madecassoside the same as centella extract? No. Madecassoside is one of four active triterpenoid compounds in centella asiatica. Centella extract contains madecassoside alongside many other compounds, but at variable and typically lower concentrations. Listing madecassoside as a separate INCI entry means it's present at a controlled, deliberate level.
What's the difference between madecassoside and asiaticoside? Both are centella triterpenoids and both support barrier repair and collagen synthesis, but through different mechanisms. Madecassoside is the stronger anti-inflammatory (via NF-κB inhibition) and barrier rebuilder. Asiaticoside is particularly effective at stimulating fibroblast proliferation and collagen gene expression, and also acts as a penetration enhancer for the other compounds. They work best together.
Can I use centella triterpenoids with retinol? Yes — in fact, centella compounds are often recommended alongside retinol specifically because they help buffer the barrier disruption that retinol can cause, particularly for those new to the ingredient. Apply centella-containing products before retinol, or on alternating evenings.
Are centella triterpenoids safe for pregnant skin? Centella asiatica has a long history of traditional use and a strong safety record. There is no evidence of topical centella compounds being contraindicated in pregnancy, though as with any skincare active, if you have specific concerns you should consult a dermatologist.
How quickly do centella triterpenoids work? Anti-inflammatory and soothing effects are typically noticeable within days of regular use. Barrier repair and collagen-building effects build over 4–8 weeks. Redness reduction in reactive or post-blemish skin is often visible within the first 1–2 weeks.
The Bottom Line
Most cica products deliver some of centella asiatica's benefits, some of the time. Formulas that isolate the four active triterpenoids — madecassoside, asiaticoside, asiatic acid, and madecassic acid — deliver predictable, targeted, individually controlled benefits across barrier repair, anti-inflammation, collagen support, and skin recovery.
The distinction matters more than it might appear: it's the difference between a generic botanical and a precision active, formulated at the compound level rather than the plant level.
Our Renewal Clarity Sheet Mask is formulated with all four centella triterpenoids as individual INCI entries, alongside 2% niacinamide, zinc PCA, and PDRN — a concentrated post-blemish formula built around compound-level centella precision.
References
Footnotes
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Bylka W, Znajdek-Awiżeń P, Studzińska-Sroka E, Dańczak-Pazdrowska A, Brzezińska M. (2014). Centella asiatica in dermatology: an overview. Int J Dermatol. 53(10):1–7. https://doi.org/10.1111/ijd.12442 ↩ ↩2 ↩3
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Bylka W, Znajdek-Awiżeń P, Studzińska-Sroka E, Brzezińska M. (2013). Centella asiatica in cosmetology. Postepy Dermatol Alergol. 30(1):46–9. https://doi.org/10.5114/pdia.2013.33378 ↩ ↩2
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Maquart FX, Bellon G, Gillery P, Wegrowski Y, Borel JP. (1990). Stimulation of collagen synthesis in fibroblast cultures by a triterpene extracted from Centella asiatica. Connect Tissue Res. 24(2):107–20. https://doi.org/10.3109/03008209009152430 ↩ ↩2
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Park JH, et al. (2012). Madecassoside inhibits lipopolysaccharide-induced iNOS expression via suppression of NF-κB and JNK pathways. Arch Pharm Res. 35(1):117–122. https://doi.org/10.1007/s12272-012-0112-7 ↩ ↩2