Women between ages of 30 and 70 need about 600 international units, and once they're over 70, that number goes up to about ...

Another key difference between the two forms of vitamin D is their source. “Vitamin D2 is usually produced by plants when ...

When the sun is out, your body can potentially make its own vitamin D, but it still may make sense to continue with ...

"Too much vitamin C can cause diarrhea, stomach ache, heartburn, esophagitis and even kidney stones," Nadeau adds. The good news, Nadeau notes, is that taking too much usually only happens when ...

How much vitamin C per day? The Recommended Dietary Allowance (RDA) for vitamin C depends on a handful of factors, including age and sex (for adults): 0 to 6 months: 40 mg 7 to 12 months: 50 mg 1 ...

While vitamin D is essential for keeping your bones strong, too much can have the opposite effect, leading to bone pain. High vitamin D intake leads to increased calcium absorption.

People are being poisoned by taking far too much of a vitamin supplement - with most of those being young and athletes ...