In most of the world's population, lactase transcription is down-regulated after weaning, resulting in diminished lactase expression in the small intestine, which causes the common symptoms of adult-type hypolactasia, or lactose intolerance.
Lactase transcription is down-regulated after weaning, resulting in diminished lactase expression in the small intestine. This was in most of the world's population. The small intestine causes the common symptoms of adult-type hypolactasia. The small intestine causes the common symptoms of adult-lactose intolerance.