Add Yahoo as a preferred source to see more of our stories on Google. A strand of hair contains three layers: the cuticle, cortex, and medulla. The design of the cuticle layer, in particular, is ...

What Are the Different Hair Types? Hair comes in four main types: straight, wavy, curly, and coily. Each hair type has its own unique characteristics. The four types are broken down into subtypes (A, ...

Split ends. Tangles. Breakage. To avoid the dire consequences of dried-out strands, knowing how to hydrate your hair is essential. And while it’s true that most hair-moisturizing advice and styling ...