Everyone’s scalp is different, and like skin, your scalp type comes down to genetics. But they all produce sebum and play an important function in hair growth. There are some key differences, though: “Sebum, which functions to moisturize and protect the scalp and hair typically has a harder time traveling down the hair shaft of those with textured hair,” explains Helen Reavey founder of Act+Acre, and a certified trichologist and celebrity hairstylist. “This often leads to dryness in both the scalp and hair, which needs to be supplemented with moisture-rich products.”