What is comedogenicity?

Everything You Need to Know About the Ingredients That Do and Do Not Clog Your Skin's Pores

It's a term we often see in skincare products: "comedogenic." So, what does it mean? Which ingredients are comedogenic and which aren't? And most importantly, why does this matter for your skin type?

What is Comedogenicity?

Comedogenicity refers to a substance's "tendency to clog skin pores." The word "comedone" means clogged pore—the basis of acne breakouts like blackheads and whiteheads. A comedogenic ingredient can accumulate on the skin's surface and block pores, leading to acne.

What is the Comedogenicity Score?

A comedogenicity score is a numerical measure that indicates a skin care ingredient's "pore-clogging potential." The scale is typically rated from 0 to 5:

• 0: No risk of pore clogging (non-comedogenic)
• 1–2: Low risk
• 3: Medium risk
• 4: High risk (may increase tendency to acne and blackheads)
• 5: Very high risk (may increase tendency to acne and blackheads)

These scores are based on lab tests, experimental studies, and user observations. However, every skin is different, so an ingredient that doesn't cause problems for one person may be comedogenic for another. These scores are generally derived from past tests on rabbit ears, and not all skin types respond the same way. So, even if an ingredient scores 3, it may be okay for some people but irritating for others.

Things to consider when looking at the comedogenicity score are as follows:

If your skin is oily and acne-prone, low-scoring ingredients should be preferred.

- The entire formulation is important; even if a single ingredient score is high, it may not cause a problem if the product is formulated in a balanced manner.

Scores are not always absolute, but they are an important guide.

Why Is It Important?

If you have oily, combination, or acne-prone skin, products containing comedogenic ingredients can cause new breakouts. If your skin is dry or normal, comedogenicity may not be as significant for you.

Common Comedogenic Ingredients

• Coconut oil (score: 4)
• Wheat germ oil (score: 5)
• Cocoa butter (score: 4)
• Lanolin derivatives
• Isopropyl myristate

Examples of Non-Comedogenic Ingredients

• Jojoba oil (score: 0–1)
• Squalane
• Aloe vera
• Argan oil (score: 0–1)
• Caprylic/Capric Triglyceride (coconut triglyceride)

Conclusion

While the comedogenicity score can guide your skincare choices, it's not the sole determining factor. Many factors influence the product's overall formulation, suitability for your skin, frequency of use, and skin response. Opting for non-comedogenic ingredients is a particularly beneficial approach for acne-prone skin, helping to keep pores clear and breathing.

Remember: There is no one-size-fits-all solution for skin care, but conscious choices always pay off.