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Concerned about vitamin D toxicity?

Vitamin D toxicity is a rare imbalance, usually caused by excessive vitamin D supplementation, that can lead to hypercalcemia (increased calcium in the blood), hyperphosphatemia (increased phosphate in the blood), and suppressed serum PTH...

Vitamin D Intake & Toxicity

Is your doctor telling you that you are taking too much vitamin D? The chart below, based on a review published by Hathcock et al., shows the incidence of vitamin D toxicity in relation to daily...

Elements Panel

Join the D*action Magnesium + Safety Project TODAY!  Take Charge of YOUR Health. A new project from GrassrootsHealth to provide you even MORE scientific information from your own body, that of others, right at home,...

How to Address a High Mercury Level

Levels of mercury in the blood are tested as part of the Magnesium plus Elements blood spot test, now offered by GrassrootsHealth. Mercury is one of the most toxic heavy metals – you can...

Understanding Nutrient Response Curves

The way the body responds to most nutrients can be described by an ‘S’ shaped curve, or Sigmoid Response Curve, such as described in the Nutrition and Medicine Webinar by Dr. Robert Heaney (from...