We determine which vitamin supplements a patient should take after doing blood tests. The blood test results demonstrate what vitamin deficiencies a patient has. If our patient has a vitamin deficiency, then they can take supplements to treat it and strengthen their hair. Some of the vitamins, biotin, vitamin B, blood medications sold in the pharmacies can cause more harm than good if taken without knowing. In this respect, if our patient actually has any vitamin or mineral deficiencies, we advise them to take supplements.