Is it fungal-acne safe?
Those itchy, stubbornly uniform little bumps that laugh at acne treatments may not be acne at all — they may be Malassezia, a yeast that feeds on specific fatty acids in your skincare. Paste any ingredient list to check it against the known trigger classes, or browse the top-rated FA-safe products we've already vetted.
What the yeast can eat here
Trigger by triggerA trigger-class heuristic, not a lab result. Malassezia's C11–C24 feeding range is mechanistically real, but finished formulas vary in dose and individual tolerance varies more — plenty of people use flagged products with zero issues, and a "safe" list is no guarantee for reactive skin.
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The proper name is Malassezia folliculitis: a yeast that lives on everyone's skin overgrows inside hair follicles, producing itchy, small, strikingly uniform bumps — often across the chest, back, shoulders, and hairline. Because it's a yeast, the usual acne arsenal barely touches it, and an established overgrowth typically needs an antifungal, not just a safer moisturizer. Our fungal acne therapy guide covers that side, from drugstore ketoconazole washes to when a prescription makes sense.
The trigger-ingredient theory this checker runs on is mechanistically grounded — Malassezia genuinely metabolizes fatty acids with C11–C24 chain lengths — but community "safe lists" are imperfect heuristics, not lab results, and individual tolerance varies widely. If the bumps persist despite an FA-safe routine, see a dermatologist: a quick KOH scrape settles the fungal-versus-bacterial question for good.
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How the checker works
The checker parses your pasted INCI list and runs every ingredient against the Malassezia trigger heuristics from the DermApproved ingredient knowledge base: named free fatty acids in the yeast's C11–C24 feeding range, a pattern match for their esters (the myristates, palmitates, stearates, and oleates that lipases can split back into food), polysorbate emulsifiers, plant oils and butters — which are largely triglycerides of exactly those acids — and fermentation ingredients, flagged separately as a debated gray zone. Hydrocarbons like squalane and mineral oil pass deliberately: the yeast has no route to metabolize them.
The browse mode flips the same logic around. Every product in our database of 11,000+ reviews carries a fungal-acne-safe flag computed from its full ingredient list, so instead of vetting bottles one by one you can pull the top-scoring FA-safe cleansers, moisturizers, serums, or sunscreens straight from the catalog — each ranked by the same overall score used across the site, and each linking to its full review.
Common questions
How do I know if my moisturizer is fungal acne safe?
Paste its full ingredient list into the checker above and it flags every Malassezia-feeding ingredient with the reason: fatty acids in the C11–C24 chain range, their esters, polysorbates, plant oils and butters, and fermentation ingredients. A clean pass means the formula avoids the yeast's known food sources — a strong signal, though individual tolerance still varies more than any list can capture.
What ingredients feed fungal acne?
Malassezia can't make its own fatty acids, so it metabolizes yours — specifically free fatty acids with carbon chains roughly 11 to 24 long (lauric, myristic, palmitic, stearic, oleic, linoleic) and anything its lipases can break down into them: fatty-acid esters like isopropyl palmitate, polysorbate emulsifiers, and most plant oils and butters, which are largely triglycerides of exactly those acids. Ferments sit in a gray zone many people with Malassezia issues choose to avoid.
Is fungal acne actually acne?
No — the name is a misnomer that stuck. It's Malassezia folliculitis: an overgrowth of a yeast that lives on everyone's skin, showing up as itchy, remarkably uniform small bumps, often across the chest, back, shoulders, and hairline. Because the culprit is a yeast and not a clogged pore with bacteria, standard acne treatments like benzoyl peroxide and salicylic acid largely miss it — which is exactly why it "won't respond to anything."
Are squalane and mineral oil okay for fungal-acne-prone skin?
Yes — both are hydrocarbons rather than fatty-acid-based lipids, and Malassezia has no enzymatic route to metabolize them, which is why they anchor so many FA-safe routines. The checker deliberately leaves them unflagged: "oil" in the name doesn't automatically mean yeast food. Squalane in particular is the go-to emollient when nearly every plant oil is off the table.
Will switching to fungal-acne-safe products clear the bumps on their own?
Sometimes, but don't count on it — removing the yeast's food supply helps it stop spreading, while actually clearing an established overgrowth usually takes an antifungal, like a ketoconazole or selenium sulfide wash used as a short-contact treatment. If the bumps persist, a dermatologist can settle the question in minutes with a KOH scrape, and our fungal acne therapy guide walks through the escalation from drugstore antifungals to prescription options.