Alopecia is a common dermatological complaint. Affected people are frequently upset and attempt to stop hair loss by taking a variety of over-the-counter vitamin and mineral supplements. However, the evidence for their effectiveness is limited. Nutrients are thought to play a major role in non-scaring alopecia. We reviewed the literature about the most common micronutrients, vitamin D and iron as well as their significance in the hair follicle cycle and hair loss treatment. 2 independent researchers reviewed peer reviewed papers published in the English language. In the present study, we sought to evaluate the possible roles of vitamin D and iron in non-scarring alopecia. A thorough literature search of the PubMed, Google Scholar and Research Gate databases was conducted to assemble published studies on the association between alopecia, blood vitamin D, iron, and ferritin levels. In this review we have found that a substantial link between vitamin D, iron and non-scarring alopecia. However, vitamin D and iron administration in correcting hair loss and managing these conditions are lacking. Hence, further studies are needed with larger number of subjects to know the role of these nutrients before vitamin D and iron can be routinely recommended as a treatment modality in these conditions