Cited skincare — every flag names its source, no upsell.
As

Asiatic Acid & Madecassic Acid (Centella triterpene acids)

Asiatic Acid · Madecassic AcidSoothing

Key compounds in cica (centella). In a lab dish they raised the collagen skin cells make, but that isn’t proof on real skin.

What it does

Asiatic acid and madecassic acid are two key compounds in centella (cica). In one lab study they raised the collagen made by skin cells. Adding vitamin C raised it further, but there was no vitamin C-only result, so it doesn’t show the two work together. None of this was tested on skin.

The EU’s ingredient database lists it as a light stabilizer (protects the product from light).European Commission, CosIng (© European Union, CC BY 4.0) · uses put in plain words by Drop ↗

The evidence, graded

emergingIn a lab study on human skin cells, asiatic acid, madecassic acid and asiaticoside each raised type I collagen output, alone and all three mixed. With vitamin C in the dish, collagen output was higher for each of them. The study gave no result for vitamin C on its own, so it does not show the two work together. None of it was tested on skin.Bonté 1994 · Planta Medica ↗

Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.

Also known as

centella acids

Pairs worth knowing

L-Ascorbic Acid (Vitamin C) · works together ↗Centella Asiatica (Cica) · works together ↗

Browse all 1238 ingredients — grouped by what they do, each with whatever evidence we can cite.

This page is public so a shared ingredient card always has its sources behind it — and so you can check them without an account.
Want more like this?
Every evidence-based flag cites its source, Drop tells you when your routine is complete, and it helps you simplify — instead of selling you more. The app launches on iOS and Android in October 2026. Rate my routine works today at /rate — no sign-in.
See what Drop doesHow Drop works