Vitamin D Deficiency Syndrome, or VDDS, exists
- when 25(OH)D levels are less than 50 ng/mL in patients
- with two or more of the following conditions: osteoporosis, heart disease, hypertension, autoimmune diseases, certain cancers, depression, chronic fatigue, or chronic pain.
VDDS is a group of diseases that are associated with chronic vitamin D insufficiency, and which cause a significant derangement of function. VDDS is more common among blacks, the aged, and those who either avoid the sun or are deprived of it.