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 PEG-16 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 PEG-16 Lanolin near the end of a label is present in tiny amounts and matters far less than the same ingredient near the top.
About PEG-16 Lanolin
It is a lanolin derivative, sourced from sheep's wool and known for deep, occlusive moisture. An ethoxylated lanolin derivative that scores high on both comedogenicity (4) and irritancy (3).
On a label it can read as Peg-16 Lanolin, Peg 16 Lanolin, Solulan 16 — worth knowing when you scan an ingredient deck.
PEG-16 Lanolin in makeup and skincare
It is a classic in lipsticks, tinted balms, and heavy moisturisers. Its irritancy is rated separately at 3/5, which is worth noting for sensitive or reactive skin.
If you deal with fungal acne (malassezia folliculitis) rather than ordinary clogged pores, note that PEG-16 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 PEG-16 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).