Are you trying to make your hair longer or thicker? Some women may want to make their hair grow longer, if it tends to be on the slow side. Some men and women want their hair to grow due to thinning. There are some products on the market that claim to help hair grow when thinning. And there are also products out there that may help hair grow longer. Some people even say that taking vitamins and eating healthy, may also help hair grow longer.