+Lactose is a [disaccharide](/wiki/Disaccharide) sugar, naturally present in [milk](/wiki/Milk) and dairy products. Composed of glucose and galactose, it serves as an energy source, though its digestion can challenge some individuals.
+## See also
+- [Sugar](/wiki/Sugar)
+- [Glucose](/wiki/Glucose)
+- [Galactose](/wiki/Galactose)
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