VITAMIN LINKED TO HAIR WHITENING AND HAIR LOSS :Premature or early hair whitening (canities) can have multiple causes, but in terms of vitamin deficiencies, the most implicated ones are Vitamin & Nutrient Deficiencies Linked to Hair Whitening.1) Vitamin B12 (Cobalamin) Deficiency:Most strongly associated with premature graying.B12 deficiency leads to impaired melanin synthesis due to defective DNA synthesis in rapidly dividing cells of hair follicles.Several studies show young patients with premature canities often have low serum B12 and sometimes associated pernicious anemia.2)Folate (Vitamin B9) & Vitamin B6:Both are involved in one carbon metabolism and methionine/homocysteine cycles necessary for normal melanogenesis.Deficiencies can disrupt pigment production.3)Vitamin D3:Emerging evidence links low vitamin D3 with hair loss and pigment changes.Vitamin D receptor signaling in follicular melanocytes is important for pigment retention.4)Vitamin E:Deficiency leads to increased oxidative stress in follicles.Since oxidative stress is a major factor in hair graying (hydrogen peroxide buildup in follicles), antioxidants like Vitamin E protect melanocytes.