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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16%

1357

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19%

131

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204

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65%

18%

13%

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10%

174

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14%

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30925

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141

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1338

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705

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26%

11%

184

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1027

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24%

15%

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1633

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166

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27%

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634

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162

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158

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124

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