According to research, an excessive buildup of hydrogen peroxide is a primary cause of grey hair. This buildup bleaches the hair from the inside out and damages the melanocyte melanin producing cells 1 in 3 people under 30 have premature greying , Most of them are B12 deficient , Your hair didnt age your mitochondria did., #B12Deficiency Grey hair isnt age, its a signal., Your cells are Glutathione: The Guardian Of Hair Color And Health Can You Reverse Gray Hair? Understanding the Role of Vitamins Does stress cause gray hair? Link and what to do