What is a reasonable vitamin D level?
The figure and table below are from Vieth (1999); one of the most widely cited articles on vitamin D. The figure shows the g…
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Vitamin D levels: Sunlight, age, and toxicity
Calcidiol is a pre-hormone that is produced based on vitamin D3 in the liver. Blood concentration of calcidiol is considered…
Feb 6, 2010
How long does it take for a food-related trait to evolve?
Often in discussions about Paleolithic nutrition, and books on the subject, we see speculations about how long it would take…
Jan 20, 2010
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