protein supplements, vitamin supplements, multivitamins, calcium supplements, calcium citrate, malabsorption, multi-vitamins, liquid protein, duodenal switch, RNY, calcium deficiency
Keywords: protein supplements, vitamin supplements, multivitamins, calcium supplements, calcium citrate, malabsorption, multi-vitamins, liquid protein, duodenal switch, RNY, calcium deficiency, geriatric care management, Roux En Y