Fungal Acne Check · Free

Is it fungal-acne
safe?

Fungal acne is fed by specific ingredients — certain fatty acids, esters and oils. Paste any product's ingredient list and the checker flags the known triggers instantly, so you can tell whether a product is safe for malassezia-prone skin before it goes on your face.

Check a Product → How it works

The label, read for triggers.

🍄
Known triggers flagged

Every ingredient is checked against a list of things malassezia feeds on — fatty acids in the C11 to C24 range, fatty-acid esters, most oils, ferments and certain emulsifiers.

✓
A clear verdict

If nothing is found, you see that plainly. If triggers are present, you see exactly which ones — not a vague "might not be suitable."

🧾
Label, not marketing

The check runs on the actual INCI list, so a product sold as gentle or "for sensitive skin" is still flagged if its real formula contains triggers.

📖
Backed by the guide

Every result links through to the full fungal-acne explainer, so a flag is a starting point for understanding the condition, not a dead end.

What the check tells you.

🟢
Safe, or not — clearly
A direct read on the product: no known triggers found, or a list of the exact ingredients that could feed malassezia.
🔍
The specific triggers
Each flagged ingredient is named, so you can decide whether to skip the product or just patch-test with eyes open.
🧬
Why it is a trigger
Triggers are grouped by type — fatty acids, esters, oils, ferments, emulsifiers — so you learn the pattern, not just the one product.
📖
The full explainer
A link through to the fungal-acne guide — what the condition is, how it differs from regular acne, and how it is managed.
🚫
No false alarms
The checker only flags ingredients that are genuinely known triggers. A clean list reads as clean — it will not invent a risk to look thorough.
🔒
Private by design
No login, no account, nothing sent to a server. Whatever you paste stays in your browser.

Three steps, a few seconds.

Copy the INCI list

Grab the full ingredient list from the product label or the brand's website. Commas or line breaks both work.

Paste and check

Drop it in and hit check. Each ingredient is matched against the known malassezia triggers in a moment.

Read the verdict

See whether it is clear or which triggers are present, then take any flag through to the full fungal-acne guide.

Questions.

What is fungal acne?
Fungal acne is the common name for malassezia folliculitis (also called pityrosporum folliculitis). It shows up as small, uniform, itchy bumps — often on the forehead, hairline, chest or back — and, despite the name, it is not true acne. It is an overgrowth of malassezia, a yeast that naturally lives on skin, so it responds to different care than bacterial acne does. Because the yeast feeds on certain skin lipids, avoiding the ingredients that feed it is a large part of managing it.
How do I know if a product is fungal acne safe?
Paste the product's full ingredient (INCI) list into the checker. It scans each ingredient against a list of known malassezia triggers and shows you which, if any, appear. If it finds none, the product is likely safe for fungal-acne-prone skin; if it flags some, you can see exactly which ingredients to be cautious about. It reads the label, not marketing claims, so a product marketed as gentle can still be flagged if its actual formula contains triggers.
What ingredients trigger fungal acne?
Malassezia feeds mainly on certain lipids, so the usual triggers are fatty acids in roughly the C11 to C24 range (such as lauric, myristic and oleic acid), many fatty-acid esters, most plant and seed oils, fermented or yeast-derived ingredients, and a handful of emulsifiers like some polysorbates. Ingredients like glycerin, hyaluronic acid, niacinamide and squalane are generally considered safe because the yeast cannot use them as food.
Is this checker a diagnosis?
No. The checker compares an ingredient list against known triggers — it cannot tell you whether you actually have fungal acne, which is a clinical diagnosis. Fungal acne is easily confused with regular acne and other bumpy-skin conditions, and the treatments differ. Use the checker to screen products, read the full fungal-acne guide to understand the condition, and see a dermatologist for a firm diagnosis and treatment plan.
Do I need an account to use it?
No. Skin Stacker has no login. Whatever you paste is checked in your browser and nothing is stored on a server, so your product lists and results stay on your device.
Where can I learn more about fungal acne?
Start with the full fungal-acne skincare guide, which covers what malassezia folliculitis is, how it differs from regular acne, and how to build a routine around it — then use this checker to screen individual products.

Check before you break out.

No ads, no affiliates, no product to sell you — just an honest read of whether a formula feeds fungal acne, straight from its ingredient list.

Check a Product →