Vitamin D deficiency creeps up on people, and causes all sorts of health problems to their bones, to their gradual decay of their immune systems, or loss of immune function, and probably some problems with their mood and health, their mental health.
A deficiência de vitamina D  afeta as pessoas, e causa todo o tipo de problemas  de saúde nos ossos, e a gradual decadência  dos sistemas imunitários, ou perda da função imunitária e, provavelmente, outros problemas no humor e na saúde, na saúde mental.