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 Chondrus Crispus (Irish Moss) 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 Chondrus Crispus (Irish Moss), so we publish the range (4) 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 Chondrus Crispus (Irish Moss) near the end of a label is present in tiny amounts and matters far less than the same ingredient near the top.
About Chondrus Crispus (Irish Moss)
It is a marine or algae extract, marketed for minerals and antioxidants. The red seaweed behind carrageenan, named on pore-clogging lists in the high range.
On a label it can read as Chondrus Crispus, Chondrus Crispus Extract, Chondrus Crispus Powder — worth knowing when you scan an ingredient deck.
Chondrus Crispus (Irish Moss) in makeup and skincare
It features in 'anti-ageing' serums, masks, and luxury complexion products. Its irritancy is rated separately at 2/5, which is low.
Lower-rated alternatives to Chondrus Crispus (Irish Moss)
If you want a similar role with a friendlier comedogenic score, consider:
- Hyaluronic Acid — comedogenic rating 0/5 (Low risk).
- Niacinamide — comedogenic rating 0/5 (Low risk).