Education September 7, 2025

Comedogenic Ingredients to Avoid: Complete List

Understanding Comedogenic Ingredients

Comedogenic ingredients are substances that have a high likelihood of clogging pores and causing acne. Understanding which ingredients to avoid is crucial for maintaining clear skin. The comedogenic rating system, developed through rabbit ear testing, rates ingredients from 0 (won't clog pores) to 5 (highly likely to clog pores).

It's important to note that comedogenicity can vary between individuals. What breaks out one person may not affect another. However, if you have acne-prone skin, it's safest to avoid ingredients with ratings of 3 or higher, and be cautious with those rated 2.

Highly Comedogenic Ingredients (Rating 4-5 - Avoid)

These ingredients have a very high likelihood of clogging pores and should be avoided in facial products if you have acne-prone skin:

Coconut Oil - Rating 4-5. One of the most comedogenic oils. Despite being "natural," it's highly pore-clogging and should never be used on acne-prone facial skin.
Cocoa Butter - Rating 4. Rich and heavy, commonly found in body products and some facial creams. Too occlusive for acne-prone skin.
Isopropyl Myristate - Rating 3-5. A common cosmetic ingredient used to make products feel smooth. Highly pore-clogging despite feeling lightweight.
Isopropyl Palmitate - Rating 3-4. Similar to isopropyl myristate, used in many cosmetics and can cause breakouts.
Myristyl Myristate - Rating 3-5. An emollient that feels nice but can clog pores significantly.
Lanolin - Rating 2-4 (varies by processing). Derived from sheep's wool, can be problematic for acne-prone skin, especially unrefined versions.
Algae Extracts - Rating varies (2-4). Many types of algae can clog pores. Unless you know the specific type and its rating, it's safer to avoid.
Wheat Germ Oil - Rating 5. Highly comedogenic, should be avoided in facial products.
Linseed Oil - Rating 4. Can cause significant breakouts in acne-prone individuals.

Moderately Comedogenic Ingredients (Rating 2-3 - Use with Caution)

These ingredients may cause issues for very sensitive or highly acne-prone skin but are generally safer than highly comedogenic ones. Always patch test:

Almond Oil - Rating 2. Generally safe for most, but can cause issues for some acne-prone individuals.
Avocado Oil - Rating 2-3. Rich and can be problematic for oily, acne-prone skin.
Olive Oil - Rating 2. Generally safe but may cause issues for some.
Shea Butter - Rating 0-2 (varies). Refined shea butter is generally safer, but unrefined can be more problematic.
Jojoba Oil - Rating 2. Generally well-tolerated but can cause issues for some.
Argan Oil - Rating 0-2. Generally safe but can cause breakouts in some individuals.
Sesame Oil - Rating 2. May cause issues for sensitive acne-prone skin.

Low Comedogenic Ingredients (Rating 0-1 - Generally Safe)

These ingredients are generally safe for acne-prone skin:

Mineral Oil - Rating 0. Completely non-comedogenic, though some prefer to avoid it for other reasons.
Squalane - Rating 0. Lightweight and mimics skin's natural sebum without clogging pores.
Hemp Seed Oil - Rating 0. Lightweight and generally safe for acne-prone skin.
Sunflower Oil - Rating 0-2. Generally safe, especially high-linoleic versions.
Grapeseed Oil - Rating 1-2. Generally well-tolerated.
Castor Oil - Rating 1. Generally safe but very thick, so use sparingly.

Understanding Ingredient Lists

Ingredients are listed in descending order by concentration. The first few ingredients make up the majority of the product. If a highly comedogenic ingredient appears in the top 5-10 ingredients, the product is more likely to cause breakouts.

However, even small amounts of highly comedogenic ingredients can cause issues for very sensitive skin. If you're highly acne-prone, it's safest to avoid products containing any highly comedogenic ingredients, regardless of their position in the list.

How to Check Products

Use our Acne Safe ingredient scanner to instantly check any product's ingredient list. Simply paste the ingredients and get immediate feedback on potential pore-clogging substances. The scanner identifies comedogenic ingredients and provides their ratings, helping you make informed decisions.

When checking products manually, look for the ingredients listed above. Be especially cautious of "natural" or "organic" products, as they often contain highly comedogenic natural oils like coconut oil.

Common Product Categories to Watch

Certain product types are more likely to contain comedogenic ingredients:

Natural/Organic Products - Often contain coconut oil, cocoa butter, and other natural but comedogenic ingredients
Rich Creams - Often use heavy butters and oils for texture
Body Products Used on Face - Body lotions and creams are often too heavy for facial skin
Makeup Products - Many foundations and concealers contain pore-clogging ingredients
Hair Products - Can contain comedogenic oils that migrate to the face

Frequently Asked Questions

Q: Are natural ingredients always better for acne?

A: No. Many natural ingredients like coconut oil and cocoa butter are highly comedogenic. Always check ingredients regardless of whether they're natural or synthetic.

Q: Can I use products with moderately comedogenic ingredients?

A: It depends on your skin's sensitivity. If you're highly acne-prone, it's safest to avoid them. If your skin is less sensitive, you may be able to tolerate them, but always patch test first.

Q: How long does it take to see if an ingredient is causing breakouts?

A: Breakouts from comedogenic ingredients typically appear 2-4 weeks after starting a new product. However, some people may react faster or slower.

Q: Can the same ingredient be safe in one product but not another?

A: Yes. The concentration, other ingredients in the formula, and how the product is used can all affect whether it causes breakouts. A small amount of a moderately comedogenic ingredient may be fine, while a large amount could cause issues.