Are There Fruit & Vegetables That Reverse Gray Hair?Foods With Vitamin B-9. Vitamin B-9, also known as folic acid, is key for colorful hair, as a folic acid deficiency will lead to premature graying. ... Copper-Rich Foods. Fruits and vegetables rich in copper include lentils, potatoes, mushrooms, dark leafy greens and dried fruit, like prunes. ... Gray Hair and Other Causes.read more >>