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 Plankton Extract 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 Plankton Extract, 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 Plankton Extract near the end of a label is present in tiny amounts and matters far less than the same ingredient near the top.
About Plankton Extract
It is a marine or algae extract, marketed for minerals and antioxidants. A marine plankton extract grouped with algae on pore-clogging lists in the high range.
On a label it can read as Plankton Extract, Plankton — worth knowing when you scan an ingredient deck.
Plankton Extract 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 Plankton Extract
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).