Vitamin D: Antidote to Winter and the Darkness (Paperback)

When sunlight strikes skin it creates vitamin D, and without this nutrient we get weak and sick, are at risk of cancer and lupus, get osteoporosis and get depressed. The scientific literature shows that millions of Americans are deficient in vitamin D. Vitamin D isn't patentable. No one sends out drug reps to sell it to your doctor. So the deficiency that you likely have is probably undiagnosed.