title: Seasonal fluctuations in parathyroid hormone in relation to vitamin D intake of postmenopausal women.
abstract: Vitamin D deficiency in elderly living at northern latitudes results in increased serum parathyroid hormone (PTH) levels after winter. Sunlight exposure and/or vitamin D supplements can prevent the PTH changes and possibly reduce PTH-mediated bone loss.
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D015663:Osteoporosis, Postmenopausal / Q000209:etiology / Q000517:prevention & control*; D010281:Parathyroid Hormone / Q000097:blood*; D012621:Seasons; D013472:Sunlight; D014807:Vitamin D / Q000008:administration & dosage*; D014808:Vitamin D Deficiency / Q000150:complications*
chemical_list: D010281:Parathyroid Hormone; D014807:Vitamin D