Ingredient
Agar
Marine algae / seaweed · INCI: Agar
How we read it
Highly comedogenic
A known pore-clogging ingredient. Avoid if you're acne-prone.
Why we read it this way
Listed as pore-clogging by Acne Clinic NYC. Marine algae and seaweed derivatives are grouped on their pore-clogging reference and are best treated with caution on acne-prone skin.
The nuance
Often used at low levels as a thickener or hydrating extract; reactions vary by person and by how much is used.