What is lactose?
Lactose is the natural sugar (carbohydrate) found in milk – 12 g lactose per 250 ml serving. Lactose has a low glycaemic index (GI).
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Lactose is the sugar found naturally in milk and the principal source of carbohydrates in milk. Lactose is a double sugar (disaccharide) as it consists of two simple sugars, galactose and glucose, bound together. Cow’s milk contains about 4.5% lactose, which translates close to 12 g lactose per cup (250 ml). About 30% of the energy of full-cream milk comes from lactose. Lactose in milk is released slowly during digestion and so has a low glycaemic index. This means that lactose does not cause blood sugar levels to spike after intake.