Solving a biological puzzle: How stress causes gray hair Harvard Stem Cell Institute (HSCI) Does Glutathione Cause Hair Loss? A Comprehensive Guide 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 Premature Grey Hair Why is it Happening to Me? Jonsson Protein 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 Top Reasons for Gray Hair: What Causes Hair Color Loss?