Centella asiatica skincare refers to formulas containing Centella asiatica (Gotu Kola) extract, standardised for triterpenes like madecassoside and asiaticoside. Effective creams and serums use 0.1–1% extract or a standardised complex (often 1–5% madecassoside content), at pH 4.5–6, to support barrier repair, calm redness and reduce transepidermal water loss within 2–4 weeks of daily use.
- Madecassoside is typically the marker compound, standardised extracts often guarantee 1–5% madecassoside by weight (Bylka et al., 2013)
- Clinical studies commonly test Centella asiatica extract at 0.1–1% in the finished formula for barrier and redness endpoints (Kim et al., 2021)
- Optimal finished-product pH for triterpene stability and skin comfort sits around 4.5–6 (dermatology formulation literature)
- Asiaticoside has been studied for stimulating collagen synthesis in wound models, with effects reported at low micromolar concentrations in vitro (Kim et al., 2021)
- Under UK Cosmetics Regulation (retained EU 1223/2009) and CosIng, Centella Asiatica Extract carries no restricted maximum concentration, unlike regulated actives such as UV filters (CosIng database)
Every third 'calming' serum launched this year seems to lean on a leaf that grows wild in ditches across Southeast Asia. That's not marketing hype — it's chemistry with a genuinely interesting backstory. But most labels don't tell you which of the four active triterpenes they're relying on, at what concentration, or whether the pH of the formula will actually let those molecules do their job on your skin barrier.
What Centella Asiatica Actually Contains
Centella asiatica — known in INCI lists as Centella Asiatica Extract, and sometimes marketed as Gotu Kola or 'Tiger Grass' — isn't a single active ingredient. It's a plant source containing a family of pentacyclic triterpenoids: asiaticoside, madecassoside, asiatic acid and madecassic acid. These four compounds behave differently in the skin, and formulators who understand that difference get very different results from the same plant.
The Four Molecules That Matter
- Madecassoside — the glycoside most associated with anti-inflammatory and soothing effects, frequently used as the standardisation marker for commercial extracts (Bylka et al., 2013)
- Asiaticoside — linked in wound-healing research to fibroblast activity and collagen deposition (Kim et al., 2021)
- Asiatic acid — the aglycone form, more lipophilic, studied for antioxidant activity
- Madecassic acid — structurally close to asiatic acid, contributing to the extract's overall anti-inflammatory profile
The ratio of these four compounds varies wildly depending on where the plant is grown, harvest season and extraction method — which is exactly why raw, unstandardised Centella asiatica powder is a gamble for a formulator, while a Certificate of Analysis stating '≥3% madecassoside' is not.
Why Cica Became the Barrier-Repair Ingredient of Choice
The word 'cica' — short for cicatrisant, meaning wound-healing — entered skincare vocabulary through Korean dermo-cosmetics, but the pharmacological interest predates the trend by decades. Centella asiatica extract has been studied in wound care and scar management contexts, with several trials showing measurable improvements in epidermal barrier markers after topical application (Kim et al., 2021).
The Mechanism, Simplified
Madecassoside and asiaticoside appear to modulate fibroblast activity and reduce pro-inflammatory signalling in irritated skin, which is why cica-labelled products are marketed toward post-procedure recovery, rosacea-prone skin and compromised barriers rather than as a classic anti-aging active. This positions Centella asiatica differently from actives like peptides, which target collagen signalling through a separate pathway — for readers curious about that mechanism, our piece on how peptides work on collagen and cell signaling lays out the comparison well.
Formulating With Centella Asiatica: Percentages, pH and Pairing
This is where marketing copy and actual formulation diverge. A serum that lists 'Centella Asiatica Extract' fifteenth on the INCI, after a dozen preservatives and thickeners, is not delivering a therapeutic dose — INCI order reflects descending concentration by mass, a rule already covered in our breakdown of what's on the label vs. what's behind it.
Practical Concentration Ranges
| Form used | Typical inclusion rate | What the % means |
|---|---|---|
| Standardised extract (e.g. 1–5% madecassoside content) | 0.1–2% of finished formula | Товарное сырьё (raw material as supplied), not pure active |
| Isolated Madecassoside | 0.05–0.5% | Active substance concentration |
| Whole-plant water extract (unstandardised) | 1–10% | Highly variable active content, batch-dependent |
| Centella Asiatica in oil macerate | 2–15% of oil phase | Low, mostly lipophilic actives (asiatic acid fraction) |
Stability is the other overlooked detail. Madecassoside and asiaticoside are glycosides that hydrolyse faster outside a pH window of roughly 4.5–6, and formulas pushed to a higher pH for sensory reasons can quietly lose potency over a 6-month shelf life, even if the INCI list looks identical on day one.
Ingredients That Pair Well
- Niacinamide — complements the barrier-support angle without competing for the same receptors; see our detailed look at niacinamide's mechanism and irritation profile
- Panthenol — reinforces the soothing/barrier narrative at 1–5% (товарное сырьё), widely used alongside cica actives in Korean-style formulas
- Ceramides — structural barrier lipids that work downstream of what Centella asiatica triggers biochemically
- Peptides — for readers building a full anti-aging routine, our guide on peptides and anti-aging skincare explains how to layer actives without formulation conflicts
Regulatory Status: What UK Formulators Need to Check
Under the UK Cosmetics Regulation (retained EU 1223/2009) and the EU CosIng database, Centella Asiatica Extract and its named derivatives (Madecassoside, Asiaticoside, Asiatic Acid) are listed as cosmetic ingredients without a specific restricted maximum concentration, unlike UV filters or certain preservatives that carry hard caps under Annexes III, V and VI. That said, any finished product still must pass a full safety assessment, and formulators should verify current listing status directly against the CosIng database and IFRA standards before finalising a formula, rather than relying on marketing claims from raw-material suppliers (CosIng database).
A Note on Fragrance and Sensitisation
Centella asiatica extract itself is not an IFRA-restricted fragrance material, but finished products combining it with essential oils or botanical complexes should still be checked against the current IFRA Standards, since co-formulated fragrance components — not the cica extract — are usually the source of any restriction.
Where the Trend Overreaches
Not every claim attached to Centella asiatica skincare holds up under scrutiny. Some marketing implies it can replace retinoids or peptides for structural anti-aging work — it can't; its mechanism is anti-inflammatory and barrier-supportive, not primarily collagen-stimulating in the way described in super-peptide research on anti-ageing chemistry. Treat cica as a calming, barrier-repair layer of a routine, not a one-ingredient solution.
- Good use case: post-retinoid recovery nights, rosacea-adjacent redness, post-procedure skin
- Poor use case: expecting visible wrinkle reduction from cica alone within weeks
- Red flag: 'Centella asiatica' listed after fragrance and colorants on the INCI — negligible dose
- Good sign: extract standardised to a stated % of madecassoside on the supplier's Certificate of Analysis
FAQ
What does centella asiatica do for skin?
It supplies triterpenes — mainly madecassoside and asiaticoside — that support barrier repair, calm redness and reduce transepidermal water loss. Effective formulas use 0.1–1% standardised extract at pH 4.5–6, with visible calming effects typically reported within 2–4 weeks of daily use.
Is centella asiatica the same as cica cream?
'Cica' is shorthand for cicatrisant (wound-healing) formulas built around Centella asiatica extract, so yes — cica creams are formulated with this plant extract, usually alongside panthenol or ceramides to reinforce the barrier-repair effect.
How much centella asiatica extract should be in a serum to work?
Look for 0.1–2% of a standardised extract (guaranteeing roughly 1–5% madecassoside content) rather than raw plant powder. Anything listed near the bottom of the INCI, after preservatives, is unlikely to deliver a therapeutic dose.
Can centella asiatica irritate sensitive skin?
It's generally considered one of the gentler soothing actives and is often used specifically for reactive, post-procedure or rosacea-prone skin, though any botanical extract can trigger individual sensitivity — patch testing is still advisable.
