noun
beauty serum; essence; liquid foundation
A skincare product applied after toner and before moisturizer; often a concentrated treatment. In some contexts, can also refer to liquid foundation.
化粧水の後に美容液をつけます。
I apply beauty serum after toner.
この美容液は肌のハリを高めます。
This serum improves skin firmness.
乳液 is a milky moisturizer, usually applied after 美容液 to lock in moisture.
Compound of 美容 (beauty) and 液 (liquid). A modern term for cosmetic serums and essences.