D-Galactal is a monosaccharide that belongs to the class of carbohydrates. It is an aldohexose, which means it has six carbon atoms and an aldehyde functional group. D-Galactal occurs naturally in certain foods such as dairy products, meats and fruits. It can also be synthesized by chemical or enzymatic processes. D-Galactal has various applications in the food industry, especially as a flavoring and sweetening agent. Additionally, it has potential research roles in metabolic disorders, cancer, and inflammation.