Is Mineral Oil Comedogenic?

Quick Answer

What Mineral Oil Actually Is

Mineral oil is a clear, colorless, odorless liquid made by refining petroleum. Chemically it is a mixture of hydrocarbons, mostly alkanes, with no fatty acids at all. That last detail matters more than it sounds, and we will come back to it.

On ingredient lists you will see it as Mineral Oil or by its INCI name, Paraffinum Liquidum. Its close relative petrolatum, also called petroleum jelly, is a thicker, semi solid version of the same family. Baby oil is usually mineral oil with added fragrance. It is also the base of many cleansing oils, barrier ointments, and bath oils, and it has been used in pharmaceutical preparations, including baby care and wound care products, for well over a century.

The important distinction is grade. Crude, unrefined mineral oil is an industrial material that still contains impurities, including polycyclic aromatic hydrocarbons. Cosmetic and pharmaceutical grade mineral oil is a different product: it is purified until those impurities are removed to levels below detection, and regulators including the US FDA and the European Medicines Agency have reviewed it and approved it for skin contact. When skincare discussions say “mineral oil”, they should mean the cosmetic grade. When old studies say “mineral oil clogged pores”, they were often testing the crude kind.

Refining also explains why mineral oil is so stable. It does not go rancid the way plant oils do, it does not oxidize into irritating byproducts on the shelf, and it contains no plant proteins or natural allergens. That chemical dullness is exactly what sensitive skin tends to tolerate well.

Its Comedogenic Rating, Explained

On the widely used 0 to 5 comedogenic scale, cosmetic grade mineral oil is rated 0. That is the consensus across ingredient databases and cosmetic references, and it sits alongside hyaluronic acid and glycerin at the bottom of the scale. Some charts print 0 to 2 instead, and that range is not a contradiction. It reflects the grade problem: historical results from less refined material scored higher, while highly refined cosmetic grade material scores 0. If you see a 2 attached to mineral oil, you are almost certainly looking at an older or ungraded result, not at the cosmetic grade product in your bathroom.

For comparison, the plant oils and butters already covered on this site show how unusual a 0 is for something that feels like an oil. Shea butter is rated 0 to 2, sweet almond oil is rated 2, rosehip oil is rated 1, coconut oil is rated 4, and cocoa butter is rated 4. Mineral oil, the petroleum ingredient, sits at the bottom of that list. Dimethicone, another synthetic emollient, is also rated 0 to 1. The pattern is worth noticing: how refined and chemically simple an ingredient is predicts its rating far better than whether it came from a plant or a refinery.

Know what the number can and cannot tell you. The comedogenic ratings quoted across the internet trace back to rabbit ear testing from the 1980s, in which ingredients were applied to rabbit ears and follicle plugging was measured. Rabbit skin is far more reactive than human skin and produces many false positives. A rating of 0 is therefore a strong reassurance rather than a guarantee, and a rating of 4 is a strong caution rather than a precise prediction. Our guide to how the comedogenic scale works covers what these numbers can and cannot tell you in more detail.

Why It Has Such a Bad Reputation

The reputation comes from three sources, and none of them survives a close look.

The first is the petroleum word itself. Petroleum sounds harsh, so people assume a petroleum derived ingredient must be harsh on skin. But refining changes the material completely. Cosmetic grade mineral oil is chemically inert, which means it does not react with skin. It does not deliver nutrients and it does not actively repair anything, but it also does not provoke much of anything, and that inertness is a feature for reactive skin.

The second is the old rabbit ear data. Early comedogenicity testing used crude mineral oil, and crude oil did clog rabbit follicles. That result entered charts and blog posts and never left, even though the material tested is not the material sold in skincare. Modern human studies of cosmetic grade mineral oil find it non comedogenic at typical use rates, and dermatologists recommend mineral oil based products specifically for sensitive and acne prone skin because of that inert chemistry.

The third is confusion between clogging and coating. Mineral oil forms a film on the skin. People feel that film, describe it as suffocating, and conclude their pores must be suffocating too. But a film on the surface is not a plug inside the pore. Petrolatum and mineral oil sit on top of the skin and slow water loss, which is why they work as barrier products. They do not sink into pores and harden there. The heavy feeling is real and worth weighing, but it is not evidence of comedones.

Why a Petroleum Ingredient Scores 0

The chemistry explains the rating. Comedogenicity in plant oils tracks closely with fatty acid profile: heavy, saturated, low linoleic fats tend to score higher, while light, high linoleic oils tend to score lower. Mineral oil has no fatty acids at all. It is pure hydrocarbon. There is nothing in it for skin chemistry to react with in the way that drives comedone formation, and nothing that oxidizes into irritating compounds.

That simplicity also explains its second advantage. Because it is so refined and inert, mineral oil rarely causes allergic reactions or sensitivity on its own. Plant oils carry the compounds that make them interesting, antioxidants, vitamins, scent molecules, and those same compounds are what sensitive skin sometimes reacts to. Mineral oil carries none of that, for better and for worse. It will not feed your skin, but it will not fight it either.

This is the point where the natural versus synthetic framing falls apart. Two of the highest rated ingredients on this site, coconut oil at 4 and cocoa butter at 4, are completely natural. Mineral oil at 0 and dimethicone at 0 to 1 are synthetic. Natural origin tells you nothing reliable about pore clogging. The rating, the refining, and the full formula tell you far more.

The Fungal Acne Note

There is one more group of readers for whom mineral oil deserves a special mention: people dealing with fungal acne. Fungal acne is driven by Malassezia yeast, which feeds on fatty acids in the C11 to C24 range. Because mineral oil contains no fatty acids, it gives that yeast nothing to eat, and it commonly appears on fungal acne safe ingredient lists.

That is a useful property, but keep it in proportion. A fungal acne safe ingredient is not a fungal acne treatment, and a product can be mineral oil based while still containing other ingredients that feed Malassezia, including many plant oils, esters, and fatty alcohols. If you are managing fungal acne, the whole formula still matters, and our guide to what fungal acne is explains how to judge a product properly. Mineral oil earns a place on the safe side of that judgement, not a free pass for the product around it.

Where It Works Best

Mineral oil is at its best in a few specific jobs.

For dry skin, it is one of the most effective moisture sealers available. Applied over damp skin or over a humectant moisturizer, it slows water loss for hours. That is why it shows up in barrier creams and body oils for very dry skin, and why it is a classic recommendation for cracked hands and feet.

For sensitive and reactive skin, its inertness is the selling point. With no fragrance compounds, no plant allergens, and no oxidation byproducts, a plain mineral oil product is one of the least likely formulas to provoke a reaction. Fragranced baby oil is the exception: the fragrance, not the mineral oil, is what sensitive skin reacts to.

As a cleansing oil or makeup remover, mineral oil is a low risk choice. It dissolves sunscreen, makeup, and sebum effectively, and because it rinses away, contact time is short. A rinse off product with a high rated ingredient is already a different proposition from a leave on cream; a rinse off product with a 0 rated ingredient is about as low risk as cleansing gets.

As a barrier for irritated or chapped skin, including around the nose during a cold or on lips, it protects while the skin recovers. It will not heal anything on its own, but it gives skin a calm, sealed environment to do its own repair.

Who Should Be Careful

A 0 rating is not a recommendation for everyone, and three groups should weigh it honestly.

If your skin is oily, you may simply dislike it. Mineral oil feels heavy and can look shiny, and on an already oily face that feel is often a dealbreaker even though the pores are not at risk. There is no prize for using an ingredient you hate. A lighter emollient like squalane or a gel moisturizer may suit you better.

If you layer occlusives over unwashed skin, you can create problems that look like breakouts. Sealing a dirty face under any occlusive, mineral oil included, traps sebum and dead skin cells against the skin. Cleanse first, then seal. This is the most common way mineral oil gets blamed for something it did not cause.

If you are choosing between products, remember the formula rule. A mineral oil product that also contains fragrance, high rated esters, or fatty alcohols near the top of the list can still break you out. The 0 belongs to mineral oil, not to everything sharing its bottle. When in doubt, run the full ingredient list through the free checker before you buy.

Mineral Oil vs Other Common Oils

The table makes the article’s point in one glance: the synthetic options cluster at the bottom of the scale, while the most celebrated natural butters sit at the top. Choose by rating and feel together, not by origin story.

5 Common Mistakes People Make With Mineral Oil

How to Check Your Own Products

Look for Mineral Oil or Paraffinum Liquidum on the label, and note its position. Near the top of a leave on cream, it is doing the heavy moisturizing work. In a cleanser, its position matters less because it rinses off. Then look at what sits around it: high rated esters, fatty alcohols, and fragrance are the lines that change the verdict.

The fastest check is the one this site exists for. Paste the full ingredient list into the free Pore-Clogging Checker and it will flag every ingredient with a pore clogging risk, so you are judging the formula you actually bought instead of one word on the label. If you are seeing new congestion and you are not sure which product is responsible, our guide to signs your skincare is clogging your pores and the closed comedones guide can help you trace it. For a safer moisturizer shortlist, see the non-comedogenic moisturizer guide, and for the full reference, the full pore-clogging ingredients list.

Frequently Asked Questions

The Bottom Line

Mineral oil earns its 0 honestly: a highly refined, chemically inert hydrocarbon that does not plug pores, does not feed Malassezia, does not go rancid, and rarely provokes sensitivity. Its bad reputation belongs to crude oil from old tests and to the understandable suspicion of the word petroleum, not to the cosmetic grade ingredient in your bathroom.

Use it where it shines: dry skin, sensitive skin, barrier care, and rinse off cleansing. Skip it if you hate a heavy feel on oily skin, and always judge the product around it, not just the one line. When a product breaks you out, check the full list before blaming the ingredient with the lowest score on the scale.