Seriously. While many factors can contribute to thin and thinning hair, a healthy scalp will provide the optimal conditions for thicker, fuller-looking hair. Think of the scalp as an extension of your face – if you never cleaned your face, you would have a less than ideal situation on your hands. Same thing goes for your scalp. By feeding it the right diet of nutrients, your scalp pores are clear and ready to foster thick, full, healthy-looking hair