Camp Grayling Joint Maneuver Training Center. Camp Grayling is a premier, full-spectrum, four-season joint training center, providing year round, customer-focused training support and high quality facilities to enable military commanders and civilian leaders to meet their unit readiness requirements.
This shows that nearly 40% of all patients with PRIMARY hyperparathyroidism have Vitamin D-25 levels that are below 20 ng/ml. 60% have vitamin D levels above 20, but that includes 29% who have levels between 20 and 30, which is considered deficient. Nobody with a parathyroid tumor has high Vitamin D-25 levels.
Quick Answer. Avoiding direct sunlight and eating a diet containing insufficient amounts of vitamin D can lead to vitamin D deficiency, according to WebMD. Illnesses that damage the ability of the intestine to absorb vitamin D, such as celiac disease, cystic fibrosis and Crohn's disease, can also lead to vitamin D deficiency. Because fat cells extract vitamin D from the blood, people who are obese often have a vitamin D deficiency.