TOPICS: Sources of vitamin D, milk, fish, plants, sun, fungus, liver, 25-OH vitamin D, kidney, 1,25-(OH)2, parathyroid glands, parathyroid hormone (PTH), 1-alpha hydroxylase, active vitamin D, cholecalciferol, vitamin D deficiency, rickets, bowed legs, osteomalacia, breastfed infants, poor diet, dark complexion, lack of sunlight, kidney failure, malabsorption, hypercalcemia, vitamin D excess, hypercalciuria, granulomatous diseases
