Hair grows from the follicle, or root, underneath the skin. The hair is ‘fed’ by blood vessels at the base of the follicle, which give it the nourishment it needs to grow. Between starting to grow and falling out years later, each hair passes through four stages: anagen, catagen, telogen and exogen. At any given time, each hair is at a different stage of the hair growth cycle.
Over time, the length of the anagen stage decreases, making the hair weaker and thinning after each hair growth cycle. That’s why it’s important to ensure your diet is rich in key nutrients to maintain normal, healthy hair growth*.