Low levels of vitamin D in the population as a whole suggest that most people need to take a vitamin D supplement. This may be especially true for seniors, as the ability to synthesize vitamin D in the skin declines with age.
Related Keywords: People Skin May Need Ability Population Whole
Related Authors: Havelock Ellis Benjamin Spock Rita Levi-Montalcini Nawal El Saadawi George Wald Kenneth H. Cooper Hans Rosling
