After all, those with low levels of vitamin E in their blood had 50% higher cancer risk. “Vitamin E: the radical protector,” with supplement sales in general forming a billion-dollar business to capitalize on the public’s fears. Remember when vitamin E was the vitamin du jour, touted as curative for many clinical disorders.

And it’s not just a hormone of calcium regulation and bone health, but a hormone of fertility and immunity and brain function. D is not a vitamin, but a hormone, produced by our skin in response to sunlight exposure. But we can make all the D we need with sufficient sun exposure. Vitamins, by definition, cannot be synthesized within our body. Within 24 hours of vitamin D exposure, you can change the expression of hundreds of genes. Upwards of 2,000 genes may be regulated by vitamin D. The vitamin D receptor is found in most tissues in the body, including the brain. Review articles like this continue to be published, touting vitamin D as a veritable cure-all.

My last in-depth video series on vitamin D was done more than four years ago-as in 15,950 papers ago. This is just an approximation of the audio contributed by Katie Schloer. To see any graphs, charts, graphics, images, and quotes to which Dr. Greger may be referring, watch the above video.

Mercola vitamin d video