The connection between vitamin D and testosterone is one of the more intriguing areas of men’s health research. The evidence is real enough to take seriously, but it comes with important caveats that most articles in this space omit. Here is the honest breakdown. The Biological Basis: VDRs in Leydig Cells Testosterone is primarily produced … Read more
Vitamin D’s role in immune function goes far deeper than most people realize. It is not simply “good for immunity” in the vague sense that marketing uses that phrase. VDRs (vitamin D receptors) are expressed on virtually every immune cell in the body. Vitamin D actively participates in the coordination of both innate and adaptive … Read more
Vitamin D deficiency affects an estimated 42% of American adults. One billion people worldwide have insufficient vitamin D levels. Most of them do not know it. The symptoms are diffuse, non-specific, and easy to attribute to other causes. Here is how to recognize the signs and who is most at risk. Why Deficiency Is So … Read more
