hi yes it can just see the info below. vitamin d deficiency: because most people spend their time in doors behind a desk or on the couch a surprisingly high percentage of the population have insufficient levels of vitamin d in their body (vitamin d is synthesized in the skin through exposure to uv rays. ) studies have shown that low vitamin d causes hair loss. too much vitamin d: high levels of vitamin d can also cause hair loss which is why it is important to have the right balance of vitamin d. and as you can see it works both ways do hope this helps you. good luck
can a deficiency in vitamin d cause hair loss