Centella asiatica does help with acne, though not in the way most acne treatments work. Rather than killing bacteria directly, its main benefit is calming the inflammation that makes breakouts red, swollen, and painful, while also speeding up the healing of marks left behind. A meta-analysis of clinical studies found a consistent reduction in acne lesion counts when centella asiatica was used, and lab research supports several specific mechanisms behind that effect.
How It Targets Acne Inflammation
Acne isn’t just a bacterial problem. Much of what you see and feel during a breakout is your immune system overreacting to bacteria inside clogged pores. The acne-causing bacterium triggers your skin cells to release inflammatory signals that cause redness, swelling, and tenderness. Centella asiatica’s strongest acne benefit is interrupting that cycle.
The plant’s key active compounds are madecassoside and asiaticoside, both belonging to a class of molecules called triterpenoids. Madecassoside in particular has been shown to block the production of a major inflammatory signal (IL-1β) released when skin cells encounter acne bacteria. It also suppresses the receptor those bacteria activate to start the inflammatory cascade in the first place. In practical terms, this means less redness, less swelling, and smaller, less painful pimples.
Madecassoside also acts as an antioxidant, protecting skin cells from the kind of oxidative damage that worsens inflammation and contributes to dark spots after a breakout heals.
It Won’t Kill Acne Bacteria
One important distinction: centella asiatica has low antimicrobial activity against acne-causing bacteria. It is not a replacement for ingredients like benzoyl peroxide or salicylic acid if your acne is driven primarily by bacterial overgrowth or clogged pores. Its strength is managing the inflammatory response to those bacteria, not eliminating them. This makes it a better supporting player than a solo treatment for most people with active breakouts.
Post-Acne Marks and Scarring
Where centella asiatica really shines is in what happens after a pimple clears. Both asiaticoside and madecassoside stimulate collagen production, specifically the types of collagen your skin needs to repair itself. Asiaticoside boosts type I collagen, the primary structural protein in skin, while both compounds promote type III collagen, which is essential in the early stages of wound repair.
For anyone dealing with post-inflammatory redness, dark marks, or shallow acne scars, this collagen-boosting effect can meaningfully speed up recovery. The compounds also promote cell growth and proliferation at wound sites. In animal studies, topical application of both asiaticoside and madecassoside accelerated wound healing and increased collagen synthesis. While acne lesions are smaller than the burn wounds studied, the underlying repair biology is the same.
What Concentration to Look For
In a four-week human study testing centella asiatica extract at 2.5% and 5% concentrations, the 5% formulation performed significantly better across every measure. Products with 5% centella extract improved skin hydration by 15 to 18% compared to baseline, while 2.5% products showed 8 to 10% improvement. The 5% concentration also outperformed the lower dose in reducing skin redness and strengthening the moisture barrier, measured by decreased water loss through the skin.
When shopping for products, look for formulations listing centella asiatica extract (sometimes called “cica”) at or near 5%. Products that list it far down the ingredient list likely contain too little to deliver meaningful results. Some products standardize their extract to contain specific percentages of the four active triterpenoids, which can be a sign of a more targeted formulation.
Pairing Centella With Other Acne Treatments
Because centella asiatica is primarily a calming, barrier-repairing ingredient, it pairs well with stronger acne actives that can irritate skin on their own. Dermatologists note that it’s commonly added to products alongside harsher actives specifically to reduce the risk of irritation. Using a centella serum or moisturizer alongside a salicylic acid cleanser or treatment is a well-tolerated combination for most people.
One pairing to be cautious about is benzoyl peroxide. Some users report that applying benzoyl peroxide and centella-based moisturizers at the same time causes irritation or reduced effectiveness of the centella product. If you use benzoyl peroxide, consider applying it and your centella product at different times of day, such as benzoyl peroxide in the morning and centella at night, or vice versa.
Side Effects and Safety
Centella asiatica is safe for most skin types, including dry, damaged, and sensitive skin. The side effect profile is minimal for topical use. The most common reaction is a burning sensation or contact dermatitis, though this is rare. If you’ve never used a centella product before, patch testing on a small area of your jaw or inner arm for a few days is a reasonable precaution.
Oral centella supplements carry more risk. In large quantities, they can cause headaches, digestive issues, drowsiness, and dizziness. Pregnant people should avoid oral centella due to a potential risk of miscarriage. People with a history of liver problems should also check with a provider before taking it internally. For acne purposes, topical application is the more common and lower-risk route.
Where Centella Fits in an Acne Routine
Think of centella asiatica as the recovery and calming step in your routine, not the primary acne fighter. It works best for people who have inflammatory acne (red, swollen pimples rather than just blackheads and whiteheads), are dealing with post-acne marks or shallow scarring, or whose skin is irritated from stronger acne treatments like retinoids or acids. It hydrates, reduces redness, supports skin repair, and helps your barrier hold up under the stress of an active acne treatment regimen.
If your main concern is clogged pores or comedonal acne, you’ll get more benefit from exfoliating acids or retinoids. But for the inflammatory and post-inflammatory side of acne, centella asiatica has genuine, well-supported benefits that make it worth adding to your lineup.