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Lactose intolerance primarily refers to a syndrome with one or more symptoms upon the consumption of food substances containing lactose sugar. Individuals may be lactose intolerant to varying degrees, depending on the severity of these symptoms. Hypolactasia is the term specifically for the small intestine producing little or no lactase enzyme ...
Lactase persistence or lactose tolerance is the continued activity of the lactase enzyme in adulthood, allowing the digestion of lactose in milk. In most mammals , the activity of the enzyme is dramatically reduced after weaning . [ 1 ]
English: Interpolated map of the percentage of adults that can digest lactose in the indigenous population of the Old World. Circles mark sample locations. Circles mark sample locations. Date
Humans are born with high levels of lactase expression. In most of the world's population, lactase transcription is down-regulated after weaning, resulting in diminished lactase expression in the small intestine, [22] which causes the common symptoms of adult-type hypolactasia, or lactose intolerance. [23]
Additionally, there is some scientific hypotheses behind Blacks more often being lactose intolerant than Whites today. In West Africa, the presence of the tsetse fly made raising cattle practically impossible, creating a historical situation in which there was no need for humans to develop higher levels of the lactate enzyme (which allows the ...
“For those who are lactose-intolerant or choose not to consume dairy for religious, preferential or personal reasons, additional food options to consider include exploring tofu, fortified orange ...
Lactose intolerance is found in most adults, except for specific geographic populations, notably those of European descent. [20] Many who benefit from a low FODMAP diet need not restrict fructose or lactose. It is possible to identify these two conditions with hydrogen and methane breath testing, thus eliminating the necessity for dietary ...
Lactose intolerance (LI) is a widespread condition affecting over one billion people worldwide. [11] Approximately 40 million Americans (or 15% of the US population) suffer from lactose intolerance, with an estimated nine million of those individuals demonstrating moderate and severe symptoms. [12]