A leave-in keeps conditioning all day, where a rinse-out stops at the shower. Here is what makes one vegan, which format suits your hair, how it differs from a hair oil, and how to apply it without greasy roots.

No shampoo regrows hair, but the right one makes every strand look fuller and keeps the scalp healthy. Here is the honest thinning-hair routine, from plant keratin shampoo to rosemary oil, and when to see a doctor instead.