Lactose intolerance is a frequent reason to avoid milk and dairy products. What is lactose?

a sugar

a lactic acid

a protein

a process of milk fermentation

Lactose is a disaccharide sugar that makes up around 2-8% of milk. Lactose intolerance is not an allergy. It is the inability to digest lactose due to insufficient levels of lactase, the enzyme that metabolizes lactose into glucose and galactose.

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1382

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205

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1340

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187

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166

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637

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162

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