Lactase deficiency (LD) is the failure to express lactase at the brush border of the small intestine. Lactose malabsorption (LM) refers to any cause of failure to digest and/or absorb lactose in the small intestine. Lactose intolerance (LI) is the occurrence of symptoms such as abdominal pain, bloating or diarrhoea in LM patients after ingestion of lactose.
乳糖酶缺乏症 (LD) 是指brush border of the small intestine(小肠的细小绒毛?我不知道这种术语怎么翻译)不能表达乳糖酶。乳糖吸收不良 (LM) 是指任何原因导致无法在小肠中消化和/或吸收乳糖。乳糖不耐症(LI)是LM患者摄入乳糖后出现腹痛、腹胀或腹泻等症状。
A recent meta-analysis estimated the prevalence of LM worldwide at 68% with higher rates reported for genetic tests than hydrogen breath tests (HBTs).LM is lowest in Nordic countries (<5% in Denmark) and highest in Korean and Han Chinese populations (approaches 100%). Large variations in LM are seen on a regional level (figure 2),
quote from Storhaug CL , Fosse SK , Fadnes LT . Country, regional, and global estimates for lactose malabsorption in adults: a systematic review and meta-analysis. Lancet Gastroenterol Hepatol 2017;2:738–46.doi:10.1016/S2468-1253(17)30154-1
『所以我非常疑惑他所说的“持续性的摄入牛奶来建立肠道菌落”是何意。听起来就像:“你应该慢慢吃点牧草青储,培育自己身体里的菌落让他们帮助你消化纤维素。”牛是这么干的我也得这么干是吧……』
Low lactase activity and its symptoms are called lactose intolerance. 乳糖酶活性低及其产生的症状被称作乳糖不耐症。成人乳糖不耐是常态,只有少部分成年人能终生耐受乳糖。后面就是北欧人的变异和一乳糖耐受的数据。