Understanding Comedogenic Ratings: How to Choose Oils That Won't Clog Your Pores
If you've ever broken out after trying a new facial oil, comedogenic ratings may explain why. But this scale is more nuanced than its reputation suggests - and misunderstanding it leads to avoiding oils that might actually help your skin.
What Is the Comedogenic Scale?
The comedogenic rating scale runs from 0 to 5, indicating how likely an ingredient is to clog pores (comedones) in controlled test conditions:
- 0: Won't clog pores
- 1: Very low likelihood
- 2: Moderately low
- 3: Moderate
- 4: Fairly high
- 5: High likelihood of clogging pores
Ratings of 0 - 2 are generally considered safe for acne-prone skin. Ratings of 3 - 5 carry increasing risk of pore-clogging, particularly for oily and breakout-prone skin types.
Important Caveats
The original comedogenic ratings were established using rabbit ear models in the 1970s and 80s - a method that is not perfectly predictive of human skin response. Additionally, an ingredient's comedogenicity depends on concentration: an oil rated 3 at 100% concentration might be perfectly safe in a serum at 5%. Individual skin biology also matters significantly - some people tolerate coconut oil (rating: 4) without breakouts, while others react to jojoba (rating: 2).
The Fatty Acid Connection
Comedogenicity correlates strongly with fatty acid composition. High-oleic oils (like coconut, olive, and avocado) tend to have higher ratings because oleic acid can increase follicular plugging in predisposed skin. High-linoleic oils (like Kalahari melon seed oil at 0 - 1) tend to have very low ratings because linoleic acid is associated with sebum balancing and reduced comedonogenesis.
Best Low-Comedogenic Oils for Acne-Prone Skin
- Kalahari Melon Seed Oil: 0 - 1
- Hemp Seed Oil: 0
- Rosehip Oil: 1
- Jojoba (liquid wax): 2
- Marula Oil: 3 - 4 (better for dry/mature skin)
Our Recommendation for Acne-Prone Skin
For oily, combination, or breakout-prone skin, our Whisper Face Serum (comedogenic rating 0 - 1) is our top recommendation. Its high linoleic content, fast-absorbing texture, and virtually odorless profile make it one of the most versatile facial oils for challenging skin types.
