Does vitamin D deficiency cause hair loss?

Vitamin D deficiency has been associated with several types of hair loss, including alopecia areata, female pattern hair loss, and telogen effluvium, but current evidence shows an association rather than a clear causal relationship. Lower vitamin D levels have been observed in individuals with these conditions, suggesting a potential role in hair follicle cycling. However, it is not yet established whether correcting vitamin D deficiency will prevent or reverse hair loss.

Key points:

Low vitamin D levels are associated with non-scarring hair loss conditions such as telogen effluvium and alopecia areata.
Vitamin D status may be linked to female pattern hair loss, although the relationship is not fully understood.
Some studies suggest a relationship between vitamin D levels and hair growth cycles.
Evidence that vitamin D deficiency directly causes hair loss remains inconclusive.

This text has been fact-checked for accuracy by Sorin Romaniuc, Pharmacist at medino.