http://goo.gl/2HuWfy
What causes grey hair can also be factors such as stress and smoking. In addition while there is no scientific evidence that any herb, supplement or product can reverse grey hair or stop grey hair forming, some nutritional deficiencies can cause conditions that result in premature gray hair.
Scientists have found that grey hair follicles have far fewer hair-repair enzymes, which in turn drives down production of melanin, and is what causes grey hair. Addressing these underlying conditions may help stop grey hair or reverse grey hair formation.
Can gray hair turn back to its normal color?
http://goo.gl/Hjbxio
Why Does Hair Turn Gray?
http://goo.gl/aJjIkV
Fact or Fiction?: Stress Causes Gray Hair
Scientists have a hunch that the gray hairs we dread (or welcome) may arrive sooner with stress
http://goo.gl/orD2y1
