What a —/5 rating means
Because no dependable rating exists, judge Chlorella by how your own skin responds rather than by a number. The absence of a score is not the same as a zero — it simply means the ingredient has not been reliably tested on the classic comedogenic scale.
About Chlorella
It is a marine or algae extract, marketed for minerals and antioxidants. A freshwater green microalga sold as a detoxifying and peptide-rich active. It sits alongside spirulina, which is rated 4 here, in the algae group that pore-clogging lists treat with caution. It is named on the AcneClinicNYC pore-clogging ingredient list, but that list does not publish a 0-5 comedogenic score for it and no Fulton-derived table we cite carries one. We therefore leave it unrated rather than invent a number — treat the listing itself as the signal.
On a label it can read as Chlorella, Chlorella Vulgaris Extract, Green Algae — worth knowing when you scan an ingredient deck.
Chlorella in makeup and skincare
It features in 'anti-ageing' serums, masks, and luxury complexion products.
Chlorella comedogenic FAQ
Is Chlorella comedogenic?
There is no established answer. No source we cite gives Chlorella a comedogenic rating, and a missing score is not the same as a 0. If you are acne-prone, watch how your skin responds.
What is the comedogenic rating of Chlorella?
Chlorella is unrated on the 0–5 comedogenic scale. Chlorella is one of 26 ingredients, out of the 216 in our dataset, that none of our cited sources gives a comedogenic number, so we leave it unrated instead of guessing.
Is Chlorella pore-clogging?
Without a published rating we cannot say either way. Its position on the ingredient list still matters: near the end of a label it is present in small amounts.