Vitamin D deficiency: Vitamin D stimulates the growth of new hair follicles, therefore experts believe a deficiency can cause hair loss or thinning. The strongest evidence shows a link between a vitamin D deficiency and alopecia areata, an autoimmune condition that causes patchy hair loss. When your body is deficient in biotin, Dr. Bhanusali says it can lead to hair thinning and brittle nails (among many other things, according to the National Institutes of Health), but since it’s Vitamin B12. Vitamin B12 is important in making DNA and helps promote the growth of healthy hair. Vitamin B12 deficiencies have been shown to increase hair loss. The National Institutes of Health recommend adults get 2.4 mcg per day. Pregnant individuals should get 2.6 mcg, while those who are breastfeeding should get 2.8 mcg. Spoon nails can also be thin and brittle. A 2022 study states that spoon nails occur in 5.4% of people with an iron deficiency. Researchers also note that iron deficiency is the most common cause This means finding the root cause of a thinning or balding head of hair can take a bit of detective work. One factor worth exploring early on is vitamin deficiency. Vitamins and minerals such as Vitamin A, B-vitamins like biotin and Vitamin B12, Iron, and Selenium are all important for hair growth and retention in their own way. Vitamin D and its receptor are intimately involved in hair growth. A deficiency in this nutrient can lead to hair loss ( Journal of Cosmetic Dermatology, Nov. 2021 ). We could, however, find no research on the effects of excess vitamin D on hair loss. On the other hand, excess vitamin A is known to cause hair loss. Aside from causing hair loss, a vitamin B12 deficiency can manifest in a lot of other symptoms. The most common is fatigue and lethargy, but people can also experience: • Weight loss. • Low appetite. • Anemia. • Low mood. • Constipation. • Signs of nerve cell damage like numbness or tingling in the extremities. The role of vitamin D has been well established in AA, which is a hair follicle-specific autoimmune disease. Systematic review and analysis by Gerkowickz et al. showed the correlation between vitamin D deficiency and AA. It analyzed a total of 14 studies. Vitamin D deficiency was found to be prevalent among all the patients suffering from AA. eX1sTU.

does vitamin d deficiency cause hair thinning