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Lactase production typically declines after weaning, as many individuals lose the ability to digest lactose in adulthood. This decrease varies among populations, with some maintaining higher lactase levels due to genetic adaptations linked to dairy consumption. In lactose-intolerant individuals, lactase levels drop significantly, leading to difficulties in digesting lactose found in dairy products. Conversely, those with lactase persistence continue to produce the enzyme into adulthood, allowing them to digest lactose without issues.

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1mo ago

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