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Therefore, in societies where tolerance is the norm, many lactose intolerant people who consume only small amounts of dairy, or have only mild symptoms, may be unaware that they cannot digest lactose. Eventually, in the 1960s, it was recognised that lactose intolerance was correlated with race in the United States.
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 ]
Gallego Romero notes that Indians who are lactose-tolerant show a genetic pattern regarding this tolerance which is "characteristic of the common European mutation". [95] According to Romero, this suggests that "the most common lactose tolerance mutation made a two-way migration out of the Middle East less than 10,000 years ago.
In a 2007 study published in Nature Genetics, Tishkoff and colleagues documented three new single-nucleotide polymorphisms associated with lactase persistence (G/C-14010, T/G-13915 and C/G-13907) among ethnic groups in East Africa that differ from the allele associated with lactose tolerance that is common in Europe (C/T-13910).
Being a certain race/ethnicity, such as African American, Hispanic or Latino, American Indian, Alaska Native, Asian American, or Pacific Islander. ... Glucose tolerance test.
The ability to digest lactose among African adults is widespread only among desert-dwelling nomadic groups that have depended upon milk for millennia. Three quarters of the adult Tutsi of Rwanda and Burundi have a high ability to digest lactose, while only 5% of the adults of the neighboring Shi people of eastern Congo can. Among Hutu, one in ...
Being a certain race/ethnicity, such as African American, Hispanic or Latino, American Indian, Alaska Native, Asian American, or Pacific Islander. ... Glucose tolerance test. In this test, you ...
AACs, in accord with linguistic evidence of repeated Nilotic assimilation of Cushites over the past 3000 years and with the high frequency of a shared East African–specific mutation associated with lactose tolerance." [27] Maasai display significant West-Eurasian admixture at roughly ~20%.