Gray Hair: Causes and What Research Says About Prevention Finding grey hair in your 20s or 30s may not be just a matter of age or genetics; health experts indicate that nutritional deficiencies play a significant role in premature greying. Research Is it Actually Possible to Reverse Gray Hair? ProHealth.com Gray Reverse 1.7 oz Just For Men 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