Cica is a skincare ingredient derived from Centella asiatica, a plant also known as tiger grass, and it works primarily by boosting collagen production, calming inflammation, and strengthening your skin’s moisture barrier. It’s one of the few botanical ingredients with a substantial body of research behind it, showing measurable benefits for wound healing, scar reduction, hydration, and irritation relief.
What Cica Actually Is
Centella asiatica is a low-growing plant found across India, Southeast Asia, Madagascar, and parts of Central America, where it has been used medicinally for centuries. The nickname “tiger grass” comes from a Chinese folk story about a farmer who watched a wounded tiger roll in a patch of the plant to heal its injuries. The extract has been included in official pharmacopoeias across Europe and Asia since the 19th century, and today it appears in everything from serums and moisturizers to sheet masks and spot treatments.
The plant’s skin benefits come from four active compounds that work together: asiaticoside, madecassoside, asiatic acid, and madecassic acid. These are all variations of the same type of molecule (triterpenes), but each one contributes slightly different effects. When you see “cica” on a product label, it typically refers to an extract containing some combination of these four compounds. You may also see them listed individually, or encounter the abbreviation TECA, which stands for a standardized extract blend.
How Cica Builds and Repairs Skin
The headline benefit of cica is its ability to stimulate your skin’s production of type I collagen, the structural protein responsible for firmness and elasticity. Collagen production naturally declines with age, and cica’s active compounds counteract this by signaling skin cells called fibroblasts to ramp up output. Asiaticoside in particular triggers collagen synthesis through a specific cell-signaling pathway, making it a common ingredient in anti-aging products.
This same collagen-boosting effect is what makes cica so effective for wound healing. When skin is damaged, whether from a cut, a burn, or a breakout, fibroblasts need to produce new collagen to rebuild the area. Cica accelerates this process while also promoting angiogenesis, the formation of new blood vessels that supply healing tissue with oxygen and nutrients. In animal studies, wounds treated with cica extract showed complete closure by day 20, with clear evidence of new skin formation and increased collagen markers in the repaired tissue.
Reducing Inflammation and Redness
Cica is a potent anti-inflammatory, which is why it shows up so often in products marketed for sensitive, reactive, or acne-prone skin. It works by dialing down several of the key chemical signals your body uses to create inflammation. Specifically, it suppresses pro-inflammatory messengers like IL-1β, IL-6, and TNF-α, while simultaneously boosting anti-inflammatory ones like IL-4 and IL-10. The net effect is less redness, less swelling, and less irritation.
This dual action, suppressing inflammatory signals while promoting calming ones, makes cica particularly relevant for conditions like atopic dermatitis (eczema). In studies using animal models of eczema, Centella asiatica extract reduced the infiltration of mast cells (immune cells that drive itching and swelling) into affected skin. It also lowered levels of IgE, an antibody closely linked to allergic skin reactions. The result was measurably less inflammatory cell activity in the skin tissue. For everyday use, this translates to cica being a solid choice when your skin is red, stinging, or reacting to environmental triggers.
Strengthening the Moisture Barrier
Your skin’s outermost layer acts as a barrier that holds moisture in and keeps irritants out. When that barrier is compromised, you lose water faster and become more vulnerable to dryness and sensitivity. Cica helps tighten this barrier, and the evidence is specific enough to put numbers on it.
In a four-week clinical study with 25 volunteers, a moisturizer containing 5% Centella asiatica extract reduced transepidermal water loss (a direct measurement of barrier strength) by 18% compared to untreated skin. Even at 2.5% concentration, the extract reduced water loss by 10%. The placebo, a moisturizer without cica, managed only 5%. Results appeared within the first week, with an 8% improvement at the 5% concentration, and continued building over the full four weeks. The extract works in part by forming a thin moisture-trapping film on the skin’s surface, thanks to its natural sugars, saponins, and polyphenols.
The same study also found that cica-containing formulations significantly reduced skin redness (measured by a colorimetry parameter) and lowered skin pH compared to the placebo. Lower skin pH generally supports a healthier barrier and a more balanced skin microbiome.
Fading Scars and Pigmentation
Cica has a specific track record with scars, particularly the raised, discolored kind that can form after surgery or injury. In a double-blind, placebo-controlled trial on patients recovering from skin graft surgery, a Centella asiatica cream significantly improved scar pigmentation scores starting at week 8, while the placebo group didn’t see comparable improvement until week 12. Overall scar appearance scores also improved significantly between weeks 4 and 12 in the cica group.
The mechanism here involves more than just collagen remodeling. Both asiaticoside and madecassoside suppress the overgrowth of keloid-forming fibroblasts, the cells responsible for producing too much scar tissue. Asiaticoside blocks a specific growth-factor pathway that drives this overgrowth, while madecassoside inhibits the migration of these cells into the scar area. This makes cica relevant not just for fading existing scars, but potentially for preventing excessive scarring in the first place. Clinical research also shows improvements in hyperpigmentation, photoaging, stretch marks, and periocular (around-the-eye) wrinkles with topical cica use.
Reading Cica on Product Labels
When shopping for cica products, you’ll encounter several different ingredient names that all trace back to the same plant. “Centella asiatica extract” is the most common listing and contains the full spectrum of active compounds. You may also see individual compounds listed: madecassoside (strongest for wound healing and anti-inflammatory effects), asiaticoside (most studied for collagen stimulation and anti-aging), madecassic acid, or asiatic acid. Some research suggests asiatic acid may actually be the most efficient of the four for burn wound healing, though all four show significant activity.
Concentration matters. The clinical studies showing clear barrier repair and anti-inflammatory benefits used extract concentrations of 2.5% to 5%, with 5% performing best. Many products don’t disclose exact percentages, so look for Centella asiatica or its derivatives appearing high on the ingredient list (ingredients are listed in descending order of concentration). Products labeled “cica cream” or “cica balm” that list the extract near the bottom likely contain negligible amounts.
Cica pairs well with other calming and hydrating ingredients like hyaluronic acid, ceramides, and niacinamide. It’s generally well tolerated by sensitive skin types, which makes sense given its anti-inflammatory profile. You can use it in the morning, at night, or both. The barrier-repair study applied products twice daily for four weeks, so consistent use over several weeks is a reasonable expectation before judging results.