8. Use That Potato Water for Your Hair

Your hair can actually get really dry and really brittle if you are lacking a lot of vitamins in your system. Vitamin B, for example, as well as optimal amounts of vitamin A and C are crucial for hair growth, so stock up on your vitamins and I promise your hair will get longer and thicker! Or, yes, you can definitely wash and rinse with potato water to get your vitamins! Daily multivitamins are helpful as well, as are vitamin treatments, or you can eat vitamin-rich foods.