Popular Skincare Products Acne Test

A comedogenic ingredient is a substance with a physical or chemical tendency to clog hair follicles and pores, leading to the formation of microcomedones, blackheads, whiteheads, and inflammatory acne papules. The comedogenicity scale ranges from 0 (completely non-pore-clogging) to 5 (severely pore-clogging).

Regular acne (Acne Vulgaris) is caused by Cutibacterium acnes bacteria trapped in dead skin cells and sebum. Fungal acne (Malassezia Folliculitis) is caused by an overgrowth of yeast naturally present on skin. Unlike bacterial acne, Malassezia feeds specifically on fatty acids with carbon chain lengths between 11 and 24, as well as esters and polysorbates. Standard antibacterial acne treatments often fail to clear fungal acne.

Yes, pure Coconut Oil has an official comedogenic rating of 4 out of 5. It is exceptionally rich in Lauric Acid (C12) and Myristic Acid (C14), which form a dense occlusive film that frequently traps sebum and debris in facial pores. While excellent for body dry skin and hair shafts, it should generally be avoided on facial acne-prone areas.

Not necessarily. A rating of 2 represents a low-to-moderate risk. In finished skincare formulas, ingredient concentration and formulation chemistry matter greatly. An ingredient with a rating of 2 listed at the very bottom of an INCI list (less than 1%) in a lightweight gel is much less likely to clog pores than a heavy cream where it is the second ingredient.

The 0-5 scale was originally established through dermatological rabbit ear and human patch testing by Dr. Albert Kligman and Dr. James Fulton. Today, it serves as the universal baseline for cosmetic chemists and estheticians to identify high-risk pore cloggers like Isopropyl Myristate (5), Wheat Germ Oil (5), and Coconut Oil (4).