Science Speaks: What causes a low vitamin D response?
On occasion we have participants who experience a lower than expected vitamin D level. In this blog we will explore possible causes of a low or slow to rise vitamin D response. 1. UVB...
Finding the right dose of vitamin D
Science Speaks: How much vitamin D do I need? We often receive questions about how much supplemental vitamin D someone should take. The key indicator of vitamin D status is the nutrient level in...
80% Reduction of Breast Cancer Risk Using Vitamin D
There are many studies that have shown the connection between breast cancer and vitamin D, starting with the epiphany of the Garland Brothers when they first drove across the country in 1974, and then...
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...
How to Time Your Vitamin D Testing with Changes in Supplementation
Participants often ask about details on how and when to change their vitamin D supplementation based on their vitamin D test results. “How much vitamin D should I take with a level of XX?”,...
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...
Does exercise improve response to vitamin D?
Does Exercise Improve Response to Vitamin D? We looked at some of our D*action data to investigate that question… As part of the D*action questionnaire, we ask participants what level(s) of exercise they engage...