I-Lactose yi-disaccharide efumaneka kwiimveliso zobisi ezincelisayo, ezibandakanya i-molecule enye ye-glucose kunye ne-molecule enye ye-galactose. Yeyona nxalenye iphambili ye-lactose, eyona nto iphambili yokutya kwabantu kunye nezinye izilwanyana ezanyisayo ngexesha lobusana. ILactose idlala imisebenzi ebalulekileyo emzimbeni womntu. Ngumthombo wamandla.