Natural Shampoo for Gray Hair: The Best Products for Healthier and Shinier LocksGray hair is a natural part of the aging process and it usually appears in your 30s or 40s. However, grays can also start appearing earlier in life due to factors such as genetics, stress, hormonal changes, and even health issues.There are a few ways you can address graying: you can choose to prolong a more youthful lo …