oral zinc supplementation with 100 mg zinc sulfate over an 8-week period in 36 patients with cystic fibrosis and 17 siblings did not affect the vitamin a transport system , as evidenced by an absence of consistent and significant quantitative changes in plasma levels of vitamin a , retinol-binding protein , and zinc , nor did the exogenous zinc appear to stimulate growth or exert any clinical benefit to the cystic fibrosis patients .
C0078794
zinc
C0043481
zinc