title: Calcium: II. Role in keratoconus.
abstract: Calcium metabolism was assessed in 18 keratoconic and 18 age- and sex-matched control subjects using four types of analyses: diet, serum, urine and hair. There was no significant difference between the two groups for dietary intake, serum, urine and hair parameters of calcium, and related minerals. Although the control group had a higher daily intake of vitamin D than did the keratoconus group, the serum levels of the active vitamin D hormone, 1,25-(OH)2 vitamin D3, were the same in both groups. These findings suggest that systemic calcium or vitamin D metabolic imbalances are not involved in maintaining eyes in a keratoconic state.
mesh_terms: D000328:Adult; D002118:Calcium / Q000097:blood / Q000378:metabolism* / Q000652:urine; D002136:Calcium, Dietary / Q000592:standards; D005260:Female; D006197:Hair / Q000032:analysis; D006801:Humans; D007640:Keratoconus / Q000378:metabolism*; D008297:Male; D008875:Middle Aged
chemical_list: D002136:Calcium, Dietary; D002118:Calcium