Fungal Acne
Ingredient Checker

Malassezia yeast feeds on certain fatty acids and esters in skincare and haircare products. Paste an ingredient list below to flag ingredients commonly linked to fungal acne (Malassezia folliculitis) breakouts. Ingredients are listed by concentration — one flagged near the top of the list matters more than one near the bottom.

This tool is an educational reference, not a diagnosis. It's built from commonly cited ingredient lists in the fungal acne / Malassezia folliculitis community and dermatology literature on lipid chain lengths yeast can metabolize (roughly C11–C24 fatty acids and esters). Individual skin responds differently — a "trigger" ingredient won't break out everyone, and this list isn't exhaustive. If you have persistent, itchy, uniform breakouts on the chest, back, or hairline, see a dermatologist for a proper diagnosis.