Besides caffeine, this mask also contains nourishing keratin and strengthening niacinamide, which together repair any damage ...

It’s formulated with hydrolyzed keratin, caffeine, and ginseng, and it supports healthier-looking, longer hair by reducing breakage. Ideal for all hair types, this mask should be applied to wet ...

Elizabeth Houshmand, MD, a double board-certified dermatologist based in Dallas, previously recommended K18’s Leave-In ...

“Healthy hair starts at the scalp, and much like it energises the body, caffeine is a great ingredient to help energise the scalp, too,” says Michele Burgess, executive director or product dev ...