Oct 10, 2017 · Stress, genetics, diseases or ailments, improper diet, age and chemical dyes can also cause premature grey hair. How Sesame Oil for Grey Hair Works? According to Traditional Chinese Medicine works, regular ingesting of black sesame seeds will improve your skin tone after 1 year, reverse grey hair within 2 years and improve your teeth in 3 years ... Wheatgrass is able to reverse gray hair and slow the entire aging process. It aids in rejuvenating the cells, thereby slowing down the aging process. Loaded with amino acids, vitamins, chlorophyll, nutrients, and live enzymes, wheatgrass is a superfood with tons of health benefits.