Low levels of vitamin D have been linked to hair loss, particularly a condition called alopecia areata, an autoimmune disorder where the immune system attacks hair follicles, leading to hair loss. Vitamin D plays a crucial role in the creation of new hair follicles, and its deficiency can disrupt the hair growth cycle, leading to thinning and hair loss. Additionally, vitamin D receptors are found in the hair follicles, and their activation is necessary for the hair growth process. A lack of sufficient vitamin D can impair this function, contributing to hair loss.

Furthermore, vitamin D also helps in reducing stress and inflammation, both of which can adversely affect hair health. Chronic stress and inflammation can disrupt the normal hair growth cycle, pushing hair follicles into the shedding phase prematurely. Ensuring adequate levels of vitamin D through sunlight exposure, diet, or supplements can help maintain hair health and potentially reduce hair loss by promoting healthy follicle function and reducing stress and inflammation in the scalp.