title: Seasonal changes in serum 25-hydroxyvitamin D concentrations among Asian immigrants.
abstract: 1. The exposure of Asian immigrants to effective quantities of naturally occurring ultraviolet light was investigated by observing the increase in serum 25-hydroxyvitamin D concentrations during the summer months. 2. The seasonal increase in adult males was greater than in adult females. 3. There was a significant positive correlation between the seasonal increase and the prevailing 25-hydroxyvitamin D concentration, compatible with the view that the accumulation of inadequate stores of 25-hydroxyvitamin D during the summer results in the low serum concentrations seen in Asian immigrants.
mesh_terms: D015652:25-Hydroxyvitamin D 2; D000328:Adult; D001208:Asia / Q000208:ethnology; D002648:Child; D004739:England; D004872:Ergocalciferols / Q000031:analogs & derivatives* / Q000097:blood; D005260:Female; D006801:Humans; D008297:Male; D012621:Seasons; D014808:Vitamin D Deficiency / Q000209:etiology
chemical_list: D004872:Ergocalciferols; D015652:25-Hydroxyvitamin D 2