What a 5/5 rating means
On the comedogenic scale, a 5 is the top of the scale — highly likely to clog pores when used at meaningful concentration. That means Carrageenan deserves attention if you break out easily, especially when it appears high on an ingredient list.
This rating is disputed. Credible sources land on different numbers for Carrageenan, so we publish the range (5) rather than a false single figure. When sources disagree this openly, your own experience carries real weight.
One thing the number cannot tell you is concentration. Ingredients are listed in descending order, so Carrageenan near the end of a label is present in tiny amounts and matters far less than the same ingredient near the top.
About Carrageenan
It is a thickener that controls how a product flows and feels. A red-algae-derived gelling agent (Irish moss) rated 5/5 on the classic scale, though at the tiny use levels in most formulas its practical impact is debated.
On a label it can read as Carrageenan, Carageenan Gum, Carrageenan Moss, Chondrus Crispus — worth knowing when you scan an ingredient deck.
Carrageenan in makeup and skincare
It sets the consistency of gels, liquid foundations, and serums. Its irritancy is rated separately at 2/5, which is low.
Lower-rated alternatives to Carrageenan
If you want a similar role with a friendlier comedogenic score, consider:
- Squalane — comedogenic rating 1/5 (Low risk).
- Niacinamide — comedogenic rating 0/5 (Low risk).