There have been several studies that have examined the effects of vitamin D deficiency on human hair. The results were not good. The vitamin D required by our bodies is synthesized by the skin when it is exposed to sunlight. If there is no exposure to sunlight and we stay indoors all day, then the levels of vitamin D that are generated in the body depletes quickly. So, can a vitamin D deficiency cause hair loss?
This is an interesting question because the answer is yes. Why? Vitamin D plays many important roles in the health of our bodies. One of its functions is to stimulate the production of strong collagen, which is the primary protein in connective tissues such as hair. Stronger collagen supports more elastic fibres, which means that our hair is less likely to break when we brush it. In addition, vitamin D helps maintain healthy skin, teeth, and gums, which can help prevent tooth decay, periodontal disease, and gingivitis. If you have hair loss, you might wish to consider Scalp Micropigmentation from https://www.hishairclinic.com/scalp-micropigmentation/
Unfortunately, when we do not get enough of this vitamin, the consequences can be far-reaching. People who do not get enough vitamin D through sunlight are more prone to common diseases such as osteoporosis, multiple sclerosis, and cancer. Although the link between vitamin D deficiency and increased risk for certain cancers has not been completely established, some studies have suggested that it might play a role in colon cancer. Hair loss is often associated with these types of cancers, but it is unclear if vitamin D is a causal factor or not.