Maps of UV Sunlight exposure correlate with Vitamin D levels and incidence of Cancer and Multiple Sclerosis.
If you take NASA space satellite photos of North America and color code the UV sunlight exposure as Dr. Grant has done on his web site, you will see a pattern remarkably similar to the incidence of cancer and multiple sclerosis. This is thought to be due to differences in Vitamin D levels. The farther north with less sun exposure and lower Vitamin D levels, there is an increased incidence of cancer and multiple sclerosis.
Diseases Caused By, or Associated With Vitamin D Deficiency:
Again here is the list: Osteoporosis, Hypertension, Cardiovascular disease, Cancer, Depression, Epilepsy, Type One Diabetes, Insulin resistance, Autoimmune Diseases, Migraine Headache, PolyCystic Ovary Disease (PCOS), Musculoskeletal and bone pain, Psoriasis, and chronic lymphocytic leukemia (CLL).
Vitamin D deficiency has been reported in 57% of 290 medical inpatients in Massachusetts, 93% of 150 patients with overt musculoskeletal pain in Minnesota, 48% of patients with Multiple Sclerosis, 50% of patients with lupus and fibromyalgia, 42% of healthy adolescents, 40% of African American Women, and 62 % of the morbidly obese, 83% of 360 patients with low back pain in Saudi Arabia, 73% of Austrian patients with Ankylosisng Spondylitis, 58% of Japanese girls with Graves's Disease, 40% of Chinese adolescent girls, 40-70% of all Finnish medical patients.
Surprisingly, we have been seeing low vitamin D levels even here in sunny Florida demonstrated by serum 25-OH Vit D blood testing. People are avoiding the sun.