Any way to prevent grey hairs?

None known: Grey hair appears as a later phase of the aging cycle. It is due to changes in the hair follicle and there is no known way to metabolically reverse this. This is why hair dye is so popular and readily available (and why some middle aged men shave their heads).

Hair Health: First thing to know is that genetics plays the biggest role - we can't change our genetics. To reduce risks of early graying & hair loss: 1. Don't Smoke. 2. Correct Zinc or Vit B deficiencies. Vegans are at risk for Vit n B12 deficiencies. 3. Ensure that your thyroid is healthy. 4. Diets> Eggs are rich in biotin. Dark greens are high in Vit A & C. Omega 3 fatty acids can be found in many>