13 citations,
April 2018 in “Journal of The American Academy of Dermatology” People with certain types of hair loss, especially lichen planopilaris and telogen effluvium, as well as African Americans, Asians, and men, are more likely to have severe vitamin D deficiency.
2 citations,
May 2022 in “Diagnostics” Vitamin D levels in hair don't match those in blood, so hair isn't a reliable indicator of Vitamin D status.
1 citations,
January 2018 in “Journal of Steroids & Hormonal Science” Oral vitamin D treatment can help some children with alopecia areata who have vitamin D deficiency.
April 2022 in “JAAD International” Women with frontal fibrosing alopecia have similar vitamin D levels to those with other hair loss types, suggesting vitamin D is not a key factor in this condition.
January 2019 in “Egyptian Journal of Obesity, Diabetes and Endocrinology” People with polycystic ovary syndrome often have low levels of vitamin D.