Vitamin D Deficiency

Latest in Vitamin D Deficiency

Sleep and Sunlight: Why Athletes Need to Prioritize Both

Seeking that extra edge on and off the field? Improving dietary and exercise habits are common New Year's resolutions, but athletes and non-athletes s...

The Scientific Reasons You Feel More Tired During Winter (And How To Combat It)

When the winter months hit, many of us feel the need to hibernate. Suddenly, getting out of bed in the morning is a Herculean task. Mid-day fatigue...

New Study Finds That Athletes Lacking This Elusive Vitamin Are Weaker, Slower and Less Explosive

A new study from the University of Tulsa has found that low levels of vitamin D can lead to a significant drop-off in athletic performance. The...

Latest Videos in Vitamin D Deficiency

Jose Antonio Defines a Supplement

Former NSCA vice president and ISSN CEO Jose Antonio defines what a supplement is.