For Star subscribers: Methyl methacrylate, which can cause severe skin reactions when used in acrylic nails, is illegal to have on the premises of a licensed nail salon in Arizona.

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Reaction kinetics and dynamics articles from across Nature Portfolio Reaction kinetics and dynamics refers to the study of why, how and how fast chemical processes take place.

The dermatologists we spoke to for this article recommend using those ingredients in hair growth serums instead of shampoos, which are washed from your hair in minutes.

Ahead, the best clarifying shampoos for curly hair for every need and budget, like fine hair, the Curly Girl Method, 4c hair, oily hair, dandruff, and more.

Discover 8 supplements with key nutrients that may support hair growth, strength, and thickness — backed by expert and tester insights.

Epilation is one of the best hair removal methods – but do you know enough about it? See everything you need to know, and the devices worth your cash now.