Grazia (UK) - - Grazia Big Beauty Issue -

stands for LIGHT-EMIT­TING DIODE, and these work to stim­u­late ac­tiv­ity in skin cells. The most com­mon colours are red and blue, with the lat­ter be­ing used to treat acne, and red to im­prove in­flam­ma­tion and rosacea.

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