Comedogenic Checker: Test Any Ingredient or Product for Pore-Clogging Risk

"Comedogenic" is the word skincare brands use when they mean "may clog pores" - and it is the single most useful filter you can apply to an ingredient list if your skin breaks out from creams, sunscreens or makeup. A comedogenic checker takes that concept and makes it mechanical: paste in a label, get a 0-5 pore-clogging rating for every ingredient, see what you are actually dealing with.

Here is how the ratings work, which ingredients score highest, and how to read results without over-reacting to a single number.

What "comedogenic" actually means

A comedogenic ingredient tends to block the follicle - the tiny channel where a hair grows out of your skin. When dead cells and sebum build up behind that blockage, a comedone forms: the technical name for what you would call a blackhead or a whitehead.

The classic 0-5 scale comes from rabbit-ear assays and dermatologist consensus tables popularized by Dr. Fulton in 1989. The rough reading:

• 0-1 - essentially non-comedogenic for most people
• 2 - low risk; fine for many, watch it if you are very clog-prone
• 3 - moderate; worth attention in leave-on products
• 4-5 - high; the usual suspects in breakouts from creams and sunscreens

Ratings describe an ingredient's tendency in isolation, not a guarantee about the finished product - more on that below.

How to run a comedogenic check in about ten seconds

The pore clogging checker works on any product with an INCI list:

1. Copy the full ingredient list from the packaging or the product page.
2. Paste it into the checker and run the analysis.
3. Read the results: every ingredient gets a 0-5 rating, and the highest-risk entries surface first with their position on the label.

The position matters as much as the rating. INCI lists run from highest concentration to lowest (above 1%), so a 4/5 ingredient at position 2 is a headline, while the same ingredient at position 24 is a rounding error for most skin.

The ingredients that score highest

Run enough labels through a comedogenic ingredients checker and the same names keep appearing:

• Isopropyl myristate (5/5) - the classic "silky slip" ester in lightweight lotions and makeup removers
• Wheat germ oil (5/5) - shows up wherever "vitamin-rich" is a selling point
• Coconut oil (4/5) - dominant in "natural" moisturizers; see our full coconut oil breakdown
• Cocoa butter and shea-heavy butters (4/5) - standard in body care, risky as face creams for clog-prone skin
• Isopropyl palmitate and octyl palmitate (4/5) - texture esters in foundation and SPF
• Lauric acid and other coconut derivatives (4/5) - common cleansing agents
• Algae extracts - film-formers that congest reactive skin at higher concentrations

None of these are "toxic" - coconut oil is wonderful on the body for many people. The question a comedogenic checker answers is narrower: is this ingredient likely to clog pores on my face?

A rating is a starting point, not a verdict

Three reasons a high-rated ingredient does not automatically mean a broken-out face:

1. Concentration and position. Ratings were measured on pure ingredients, not on a 1% sprinkle in a gel cream.
2. The formula around it. Fatty alcohols sound alarming and rate low; a "clean" oil can sit in a wax-heavy base that pockets under the skin.
3. Your skin decides. Comedogenicity studies are population averages. Some people use palm-oil-heavy balms daily with zero comedones; others get clogged by 2/5 ingredients.

Use the checker to shortlist suspects, then let a two-week single-change test deliver the verdict.

What about "comedogenic ingredients checker apps"?

Search the app stores and you will find several. The differences that matter:

• Where the analysis runs. This checker runs entirely in your browser - your labels never leave your device.
• What powers the ratings. Ours is built on the published Fulton-style tables, with each rating and its source shown in the results instead of hidden behind a black box.
• Whether you need an account. You do not here. Paste, check, done.

If you publish content about skincare, you can also embed the checker directly on your own site.

FAQ

What does a 0-5 comedogenic rating mean?

It is a scale for how likely an ingredient is to clog pores: 0 means no observed pore-clogging tendency, 5 means a high one. 0-1 is safe territory for nearly everyone; 4-5 is where breakout-prone skin should pay attention, especially in leave-on products applied to the face.

Is coconut oil comedogenic?

Yes - it typically rates 4/5, which is why it feels wonderful on the body and is a common trigger on the face. Highly refined versions may behave slightly differently, but if your skin clogs easily, coconut oil on the face is a bet you do not need to take.

Does one high-rated ingredient mean the product will break me out?

Not automatically. Concentration, position on the label and the rest of the formula all modulate the risk. Treat a 4-5/5 ingredient in the top five as a red flag worth a two-week test; the same ingredient buried at the bottom of the list is rarely the problem.

Is this comedogenic checker free?

Completely - no account, no upload, no cost. It runs in your browser and supports the full ingredient database behind it, so you can check a single ingredient or a whole product label.

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Start with the product you apply most often - for most people that is sunscreen or moisturizer. Run it through the checker, and if the results surprise you, our guide on how to use the pore clogging checker turns a label scan into a full routine audit.