Get your vitamin D:
Many people fall short in consumption of vitamin D, studies show - Sun Sentinel: "Dr. Michael F. Holick, a Vitamin D expert at the Boston University School of Medicine, has been quoted as saying that Vitamin D is the most common nutritional deficiency and probably the most common medical problem in the world.
Getting adequate Vitamin D would seem easy. We need to spend only a few minutes a day in the sun.
In general, 5 to 10 minutes a day between 10 a.m. and 3 p.m. with minimal clothing is considered good. But cloud cover, sunscreen, skin pigmentation and even northern latitudes can reduce the penetration of ultraviolet-B rays.
And with sedentary lifestyles and concerns about skin cancer, many people never get enough sun to provide adequate amounts of Vitamin D."