Can You Reverse Gray Hair? Understanding the Role of Vitamins Comment hair to get free ebook. Science of Early Greying (<30 years): When melanocytes (the pigment making cells) lose energy and protection from free radicals, they stop producing melanin and your black turns 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 DAY 34 100% Grey Hair Reverse Formula Hair that has already turned grey cannot be naturally reversed. However, progression can be slowed, new greys can be delayed, and overall hair quality