As far as nutrients go, vitamin D is one of the most widely useful—but oft-overlooked—things we put in our bodies. For ...
As a rule, younger people need less vitamin D than older people, regardless of sex. This article explains average vitamin D ...
The Vitamin D Blood Test (25-OH Vitamin D): Who, How, When, and Where Clinically speaking, things began to change in the 1970s when the blood test for vitamin D (known as the "25-OH vitamin D ...