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Initial Vitamin D Levels on the Rise

Our very first D*action test results came in just over 9 years ago, in January 2009. Over 11,500 individuals have now taken part in our “observational field trial” by sharing their vitamin D test...

Could Vitamin D Prevent a Flu Epidemic?

February 8, 2018 According to the Centers for Disease Control and Prevention (CDC) estimates, this winter’s flu season is on track to be worse than that of the 2014-2015 season when 34 million Americans...

Vitamin D Hacking Using Science

Why is vitamin D important? GrassroosHealth summarized many different research papers into one chart in order to explain why vitamin D levels are critical to disease prevention: What? How do I read this? GrassrootsHealth...

Memorial Day Sale! Get 15% off test kits and a free Sunshine eBook! Use code MEMORIAL15 . Offer ends Tuesday, May 27th 2025(Not valid on sale items or the T1D Prevention Test Kit)

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