Plants growth starts and improves with healthy and nutrient rich roots and the moment roots get damaged the whole plant starts to get damaged. Now, apply the same formula for your hair. YES! Hair health starts with hair follicles, which are literally the roots of hair and hair follicles are there in the scalp. Thus, the conclusion is, in order to have healthy, shiny and voluminous hair, you need to first start working on your scalp health and proper nutrition.