Blue and red light can affect acne-causing bacteria and inflammation in clinical settings, at clinical doses. The at-home masks that use the same idea sell on that research while delivering a fraction of the light intensity, for a fraction of the exposure time studies actually used.
This is a call, not just a number: even where the underlying science has something to it, the consumer product doesn't deliver enough of it to matter. Save the few hundred pounds for something in-clinic or prescribed instead.
Ranked honestly against the other things people reach for. Same concern, different pathways.
Want this ranked for your skin, not the average?
Take the quizSource: Acne vulgaris: management (NG198), Treatment of Acne Vulgaris During Pregnancy and Lactation: A Narrative Review · 0 affirmed claims