Methyl Undecenoyl Leucinate is a lipoamino acid derivative combining undecylenic acid and the amino acid leucine, used in skincare to help regulate sebum production and reduce oily-skin and blemish-related concerns. It is typically incorporated into treatments targeting acne-prone, oily, or combination skin.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin irritation or redness | Uncommon | Transient erythema or stinging may occur, particularly on sensitive skin or at higher concentrations. |
Skin dryness | Uncommon | Possible due to sebum-reducing activity, especially with frequent use. |
Contact dermatitis / allergic reaction | Rare | Hypersensitivity to the ingredient is infrequently reported but possible in predisposed individuals. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.