Two of InStyle's curly-haired editors gave keratin treatments a try and reported back with their results. Sam Reed, who has type 3A curls, tried a treatment without formaldehyde. Meanwhile ...

Is Keratin the Same as a Japanese Hair Straightening Treatment? Although keratin treatments are a type of hair straightening, they are different from other straightening methods. Taylor explains ...

Keratin is a type of fibrous, protective protein found naturally in hair, skin and nails, explains Madison Roulan, co–owner of New-York based Rule On Salon. “It’s basically a structural ...

Many shampoos, conditioners, and leave-ins contain artificial keratin combined with silicones or emollients to improve shine. While you can get similar hair benefits (like less frizz and breakage) ...