Comedogenic vs non-comedogenic

Pore-Clogging Ingredients

If your skin is acne-prone, a single ingredient can undo a whole routine. Here is a plain-language, sourced overview of the ingredients most commonly rated as pore-clogging - and the ones commonly considered non-comedogenic - so you can read a label with more confidence. Informational only, not a verdict on any one product or your skin.

Where to start

"Comedogenic" simply means an ingredient is more likely to block pores and feed the clogged bumps (comedones) behind breakouts. The familiar 0-to-5 comedogenic scale is a useful starting point, but it comes from dated animal-ear studies and testing of raw ingredients - not finished formulas. A high-rated ingredient near the end of a well-built formula behaves very differently from the same ingredient dolloped on neat.

So treat comedogenic ratings as a flag to check, not a sentence. What matters most is the whole formula, where the ingredient sits in the list, and how your own skin actually reacts. The practical approach: learn the handful of usual suspects, patch-test anything new, and lean on the ingredients that hydrate and soothe without sitting heavy on the skin.

The watch-list

Commonly pore-clogging, and lighter swaps.

Two short lists to scan a label against. The left column gathers ingredients commonly rated higher on the comedogenic scale; the right gathers ones commonly considered non-comedogenic. These are general, conservative pointers - not a verdict on any specific product or your skin.

Commonly rated pore-clogging

Frequently rated higher on the comedogenic scale, especially for acne-prone or oily skin. A high rating is a reason to check where the ingredient sits in a formula and how your skin reacts - not proof a finished product will break you out.

Commonly considered non-comedogenic

Widely used ingredients that tend to hydrate or soothe without sitting heavy on the skin. Still worth a patch test - non-comedogenic is a general tendency, not a guarantee for every skin type.

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From the catalog

Products that lean on lighter ingredients.

A few analysed products from our catalogue whose formulas skew toward lighter, non-comedogenic ingredients. This is context, not a clearance - always read the full ingredient list and watch how your own skin responds.

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Questions

Pore-clogging ingredients, answered simply.

What does comedogenic mean?
Comedogenic means an ingredient is more likely to block pores and contribute to comedones - the blackheads and whiteheads behind many breakouts. Ingredients are often ranked on a 0-to-5 comedogenic scale, where 0 is very unlikely to clog and 5 is highly likely. It is a helpful flag, but the scale comes from dated tests of raw ingredients, so it describes tendency rather than a guarantee.
Is isopropyl myristate pore-clogging?
Isopropyl myristate is one of the most frequently cited pore-clogging emollients and is commonly rated 4-5 on the comedogenic scale. That makes it worth watching on acne-prone skin, especially when it appears high in a leave-on formula. It does not automatically break everyone out - concentration, the rest of the formula and your own skin all matter. You can see the full breakdown on our isopropyl myristate ingredient page.
How does the comedogenic rating scale work?
The scale runs from 0 (very unlikely to clog pores) to 5 (highly likely). It originated from studies applying pure ingredients to animal ears, so it reflects raw ingredients rather than finished cosmetics. Use it to spot ingredients worth a second look, but remember that a low percentage of a high-rated ingredient in a well-built formula can behave very differently from the number alone.
Which ingredients are non-comedogenic?
Ingredients commonly considered non-comedogenic include niacinamide, hyaluronic acid, glycerin, squalane, dimethicone, zinc oxide, panthenol and allantoin. They tend to hydrate, soothe or protect without sitting heavy on the skin. Non-comedogenic is a general tendency though, not a promise for every skin type, so a patch test is still smart.
Are pore-clogging ingredients the same as fungal-acne triggers?
No - they are two different lists. Comedogenic ingredients clog pores mechanically, while fungal acne (malassezia folliculitis) is fed mainly by certain esters, fatty acids and oils that the yeast can metabolise. Some ingredients appear on both lists, but a non-comedogenic product is not automatically fungal-acne safe. If breakouts look like uniform small bumps, it is worth checking the fungal-acne angle too.
How can GlowLens help me check a product?
Paste a product's ingredient list or scan the label and GlowLens breaks it down ingredient by ingredient, flagging the ones commonly rated as pore-clogging and pointing to lighter, non-comedogenic alternatives. It is an informational tool to help you read labels - not a medical service, and not a substitute for a dermatologist if you are treating persistent acne.

Check your own routine

Not sure what is clogging your pores?

Scan any product and see every ingredient broken down in seconds - including the ones commonly rated as pore-clogging.

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Free forever. No account. Informational only - not medical advice.