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The prospective pilot study is designed to evaluate vitamin D status pre-operatively and post-operatively in 37 female patients undergoing either Roux-en Y gastric bypass or sleeve gastrectomy at The Methodist Hospital with 32 patients expecting to complete the 12 week trial. Women scheduled for
During the last year, clinical studies on vitamin D have confirmed the presence of world-wide incidence of vitamin D deficiency. Recently, the investigators detected an incidence of 80% vitamin D deficiency/ insufficiency in patients presenting to our tertiary stone clinic. However, there is no data
We hypothesize that by Chronic Kidney Disease (CKD) late Stage 3 and Stage 4 patients are no longer able to maintain calcium balance by excreting their daily intake of calcium. We also hypothesize that the retention of calcium is not reflected in the serum concentration, as the body attempts to