What a 4/5 rating means
On the comedogenic scale, a 4 is in the high-risk band, with a real likelihood of clogging pores on acne-prone skin. That means Acetylated Lanolin deserves attention if you break out easily, especially when it appears high on an ingredient list.
One thing the number cannot tell you is concentration. Ingredients are listed in descending order, so Acetylated Lanolin near the end of a label is present in tiny amounts and matters far less than the same ingredient near the top.
About Acetylated Lanolin
It is a lanolin derivative, sourced from sheep's wool and known for deep, occlusive moisture. A heavy, occlusive lanolin derivative used in rich balms. Rated 4/5 for pore-clogging.
On a label it can read as Acetylated Lanolin, Acetylated Wool Fat, Acetylated Wool Wax — worth knowing when you scan an ingredient deck.
Acetylated Lanolin in makeup and skincare
It is a classic in lipsticks, tinted balms, and heavy moisturisers. Its irritancy is rated separately at 0/5, which is low.
If you deal with fungal acne (malassezia folliculitis) rather than ordinary clogged pores, note that Acetylated Lanolin is among the fatty-acid or ester-type ingredients that community sources commonly avoid — a separate concern from its comedogenic score, and one with weaker evidence behind it.
Lower-rated alternatives to Acetylated Lanolin
If you want a similar role with a friendlier comedogenic score, consider:
- Squalane — comedogenic rating 1/5 (Low risk).
- Petrolatum — comedogenic rating 0/5 (Low risk).
Acetylated Lanolin comedogenic FAQ
Is Acetylated Lanolin comedogenic?
It can be. Acetylated Lanolin is rated 4/5 (high risk) on the 0–5 comedogenic scale, so it has a real chance of clogging pores on acne-prone skin, especially high on an ingredient list.
What is the comedogenic rating of Acetylated Lanolin?
Acetylated Lanolin has a comedogenic rating of 4/5 (high risk). Of the 190 ingredients in our dataset with a published rating, 13 rate higher than Acetylated Lanolin, 151 rate lower, and 25 others share its 4/5. Among the 8 rated lanolin derivatives, none rate higher and 4 lower. The figure is drawn from 2 cited sources, listed on this page.
Is Acetylated Lanolin pore-clogging?
It is one of the more likely ones. At 4/5, Acetylated Lanolin is in the high-risk band. It matters most when it appears near the top of an ingredient list, where it makes up a larger share of the product. Comedogenic ratings come mostly from rabbit-ear assays and small human patch tests of the pure ingredient at high concentration, so they are a screening guide, not a prediction for your skin or a medical claim.