Pore clogger checker

Paste any skincare ingredient list. We flag the known pore-clogging (comedogenic) ingredients and weight them by where they sit on the list — because ingredient #2 matters far more than ingredient #30.

  • Free
  • No sign-up
  • Runs in your browser
Nothing leaves your browser — this runs locally.

How to use it

Three steps to a risk read

  1. Grab the ingredient list

    Copy it straight from the packaging or the brand's product page.
  2. Paste it into the box above

    Commas or line breaks both work — no need to tidy it first.
  3. Check the drivers, not just the verdict

    The risk badge is a summary; the ingredients listed underneath show exactly what caused it.

Method

How this checker works

Comedogenic ratings run 0–5 on the Fulton scale, originally measured on rabbit ears with neat ingredients — not finished formulas. That's why a raw rating on its own is misleading: coconut oil at 40% behaves nothing like coconut oil as the last item on a list.

So we weight every rated ingredient by its INCI position, since lists are ordered by concentration down to 1%. An ingredient rated 5 near the top drives the risk; the same ingredient at position 30 barely moves it. We surface the drivers rated 3 or above so you can see exactly what caused the call.

Limits

What a rating can't tell you

  • Concentration is invisible. Below 1%, INCI order is arbitrary, so a scary-looking ingredient may be present in a trace amount.
  • Formulation changes behaviour. Fatty acids bound into an emulsifier system don't act like the free oil.
  • Skin is individual. Plenty of acne-prone people wear a "4" with no problem, and break out from a "0". Patch-test rather than banning ingredients outright.

Common questions

Acne-safe ingredient checker FAQ

Is this an acne safe checker? It checks one specific risk: comedogenicity, meaning ingredients associated with blocked pores and closed comedones. Irritation, fragrance sensitivity and hormonal acne aren't visible in an ingredient list.

What does a comedogenic rating of 0–5 mean? It comes from old rabbit-ear assays: 0 is non-comedogenic, 5 is highly comedogenic. It's a rough signal for a raw ingredient, not a verdict on a finished formula, where concentration and the rest of the base matter more.

My bumps are itchy and all the same size — is that pore clogging? That pattern usually points to malassezia (fungal acne) rather than comedones. Run the same list through the fungal acne checker — it flags a completely different ingredient set.

Should I avoid every flagged ingredient? No. Position matters: coconut oil at #2 is a real risk, the same ingredient at #25 is usually a trace. Use the flags to shortlist suspects, then patch test.

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Want this for whole products?

Skinparency rates finished formulas — pore-clogging risk, texture, sting, whitecast and price reality, all in one verdict.

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