High Potassium Foods 12 Healthy Foods to Support Your Immune SystemData Sources and References Ferrari S. Calcium and vitamin D: skeletal and extraskeletal health Rev Med Suisse. 2007 Jun 13;3(115):1515-6, 1518-20. 17682795 Gunton JE, Girgis CM, Baldock PA, Lips P. Vitamin D, muscle an...