Galactose is a six-carbon monosaccharide. It occurs in both open-chain and cyclic forms. The open-chain form has a carbonyl group at one end of the chain, which makes it an aldehyde derivative, therefore an aldohexose and a reducing sugar. In the cyclic form, it can exist as four different isomers.[1] The main dietary source is … Continue reading Galactose: properties, sources, metabolism & galactosemia