Efficacy of l-cysteine in increasing circulatory hydrogen sulfide, nitrite, and 25-hydroxyvitamin D levels in Zucker diabetic fatty rats and in vitro treatment of hydrogen sulfide and nitrite in upregulating vitamin D hydroxylase genes in monocytes
ABSTRACT: Dairy products, such as whey proteins, have been effectively used to enhance the effectiveness of vitamin D (VD) fortification and optimize circulating 25-hydroxyvitamin D [25(OH)VD] levels.Whey protein is rich in l-cysteine (LC) which is the precursor of hydrogen sulfide (H2S), enhances glutathione (GSH) biosynthesis, and promotes positi