Vitamin D Resistance and Alopecia

The document discussed the metabolism of vitamin D, highlighting its production in the skin after sunlight exposure and subsequent conversion in the liver and kidneys to its active form, calcitriol. It was noted that vitamin D, primarily known for regulating calcium in the small intestine, bone, and kidney, also had implications for other tissues. The research suggested a potential link between vitamin D resistance and alopecia, indicating that vitamin D's role might extend beyond traditional calcium regulation to include effects on hair growth and health.