Suckling of infants is universal among mammals, which are after all named after the Latin mamma for teat. Early mammals, around 200 million years ago, presumably had a variety of milk-specific sugars.

Lactose intolerance is an inability to digest the sugar in milk, called lactose. It’s a common problem that affects up to 68 percent of people. Normally, your small intestines produce an enzyme called ...

Glucose-galactose malabsorption (GGM) is a rare metabolic condition. It occurs when a genetic variation makes the body unable to properly absorb the simple sugars glucose and galactose. Sugars are the ...