Vitamin D deficiency is more common than most of us know. Our bodies use Vitamin D in many ways. Bone health and an improved immune system are the most widely known. Weak immune system, depression, weight gain, heart disease and some cancers (breast, colon and prostate) may all be linked to vitamin D deficiency. Sunlight is the number one source of vitamin … [Read more...] about Vitamin D Deficiency: Important Causes and Remedies