Your hair isn't as thick as it used to be. You've chalked it up to being older. On the other hand, you wish there was something you could do to get back the thick hair you once had. Can something as simple as taking a few supplements really help you, though? Supplements, in their purest forms, are a type of nutrition. They provide your body with the substances it needs - vitamins, minerals, and other nutrients - that you are not getting. In some cases, the use of supplements can help to restore health hair growth. Whether or not this works for you depends on a number of factors.