This natural source of healthy fatty acids is also very tasty. You can afford avocados and eat them on a daily basis. Be careful if you count calories and do not want to gain extra pounds. If you eat avocados more often, you will soon notice that your hair starts changing. Its structure will improve. This happens due to the fact that avocados stimulate elastin and collagen production. You can use avocados mixed with sour cream as a hair mask. Apply the mixture and rinse it off after 15 minutes.