Centella Asiatica (Cica): What the Science Says About the Skin-Soothing Botanical

A cica (Centella asiatica) explainer: what the triterpenes do, what the evidence says about soothing, collagen support, and barrier care, why we chose 1% in the YinShun formula, and five quick FAQ answers.

Centella Asiatica (Cica): What the Science Says About the Skin-Soothing Botanical

Bottom line first: Centella asiatica — often called cica or gotu kola — is one of the most studied botanicals in modern skincare, with peer-reviewed evidence behind its ability to support collagen synthesis, calm visible redness, and defend skin against oxidative stress. The active compounds are triterpenes: asiaticoside, madecassoside, asiatic acid, and madecassic acid. Most clinical data has been generated at low concentrations in well-formulated vehicles, which is why our YinShun cica serum uses Centella asiatica extract at 1% paired with niacinamide at 1% — a research-aligned, gentle dose rather than a headline-grabbing one.

What cica actually is

Centella asiatica is a small herb native to tropical and subtropical regions, including parts of Asia, India, and Africa. It belongs to the Apiaceae family, the same plant family as carrots and parsley. In skincare, "cica" is shorthand for the plant extract, but the science focuses on four pentacyclic triterpenes — asiaticoside, madecassoside, asiatic acid, and madecassic acid — often called centelloids. A 2025 dermatology review notes that these compounds drive the plant's activity through well-described pathways, including stimulation of fibroblast proliferation, upregulation of collagen synthesis, enhancement of angiogenesis, and modulation of pro-inflammatory cytokine signaling. In plain terms: the ingredient works on several levels at once rather than through one dramatic mechanism.

What the evidence shows

A widely cited review in Postepy Dermatologii i Alergologii (2013) summarizes the cosmetic applications of Centella asiatica. The authors describe how asiaticoside and madecassoside stimulate type I collagen synthesis in human dermal fibroblast cells, and they report a randomized, double-blind trial in 20 women (45–60 years old) with photoaged skin who applied 0.1% madecassoside together with 5% vitamin C for six months. The regimen produced significant improvements in firmness, elasticity, and skin hydration, confirmed by biometrological measurements — Centella asiatica in cosmetology (PMC3834700).

A 2024 review in Pharmaceutics focuses on topical applications and collects recent mechanistic and clinical data. It highlights how asiaticoside, madecassoside, asiatic acid, and madecassic acid enhance collagen synthesis, modulate inflammation, and offer antioxidant protection, and it reviews how delivery systems — hydrogels, nanostructures, microneedles — improve outcomes across wound types — Topical application of Centella asiatica: mechanisms and clinical insights (PubMed 39458583). For everyday skincare, the collagen-support and antioxidant findings matter most; the wound-care context of many early studies is a separate medical setting.

A 2026 review in the Journal of Integrative Dermatology adds that cica shows anti-inflammatory and antioxidant activity through pathways including NF-κB, JAK/STAT, COX-2, and LOX signaling, and notes the ingredient is generally well tolerated, with adverse reactions uncommon and only rare case reports of allergic contact dermatitis — A review of the dermatologic activity and applications of Centella asiatica (J Integr Dermatol).

Two caveats are worth stating plainly. First, much of the foundational data comes from in vitro and animal models, so the molecular story is stronger than the clinical story. Second, the positive human trials are small. The evidence is promising and consistent, but it supports a role as a well-tolerated supporting ingredient for visible calmness and barrier comfort — not dramatic claims.

Why 1% in our YinShun formula

Actives do not get better simply because the percentage on the label is higher. For plant extracts, the relevant question is whether the active fraction sits at a concentration with evidence behind it. Clinical work has used madecassoside at 0.1% in a serum context, and topical models have used asiaticoside at 0.2%, so a 1% extract level stays inside the studied range while leaving room for a balanced formula. YinShun 配方 details for our cica serum: Centella asiatica (gotu kola) extract 1%, niacinamide 1%, sodium hyaluronate, carnosine, and a base with no added fragrance, colorants, or parabens. The niacinamide pairing is deliberate: both ingredients support barrier comfort through different routes — cica via collagen and antioxidant signaling, niacinamide via ceramide synthesis — which is why the combination shows up in dermatology-oriented formulas.

How to fit it into a routine

Cica plays well with almost everything because it is a supportive ingredient rather than a strong exfoliant or rapid-turnover active. It layers comfortably under moisturizers and sunscreens, and it can be used alongside stronger actives such as BHA or retinol in the same routine. For sensitive or easily irritated skin, a cica serum is a reasonable daily staple; for everyone else, it earns its place on days when skin feels tight, flushed, or over-exposed to weather and pollution. Patch-test first if you have known plant allergies, and stop use if redness or itching develops — rare but reported.

FAQ

Is Centella asiatica the same as cica? Yes. "Cica" is the common skincare shorthand for Centella asiatica extract, sometimes marketed as gotu kola. Products labeled cica typically contain the extract or its purified triterpenes.

Is cica meant to repair damaged skin? Cica is a cosmetic ingredient, not a medicine. Research shows it supports collagen synthesis, soothes visible redness, and provides antioxidant protection, but skincare products should not be expected to fix wounded or damaged skin — that is a medical matter.

Is cica safe for sensitive or acne-prone skin? Generally yes. The ingredient is well tolerated in most published work, and its anti-inflammatory profile is why it appears in formulas aimed at sensitive skin. Rare allergic contact dermatitis has been reported, so patch-testing is still a sensible habit.

How long before I see results? Expect supportive effects — less tightness, visibly calmer tone, easier layering with other actives — within two to four weeks of consistent use. Dramatic changes are not what this ingredient is for; it is a foundation ingredient, not a spotlight one.

Can I use cica with niacinamide or BHA? Yes. Cica layers well with niacinamide (our serum combines them), and it is often used to buffer stronger actives such as BHA and retinol by supporting the barrier between applications.