Lactose tolerance may have surprising roots in Europe.
Milk drinkers who can’t digest lactose experience diarrhea, gas, bloating and intestinal cramps. Those uncomfortable reactions were too mild to move the evolutionary needle toward lactose tolerance on their own, Evershed’s group says. But during periodic famines and infectious disease outbreaks, lactose-induced diarrhea became fatal for severely malnourished individuals in farming communities, the scientists suggest.
date to as early as around 7,400 years ago in Europe . If these foods were widely available, it’s unclear why lactose intolerant Europeans would not have survived times of famine or disease, Craig says. At the beginning of that time span, migrating farmers introduced dairying to southeastern Europe’s Balkan Peninsula, where residents embraced regular milk drinking, the investigators say. Milk use then fluctuated over time in different parts of the continent. After about 7,500 years ago, relatively heavy milk use characterized western France, northern Europe and the British Isles. Dairying occurred less often in central Europe.
Before that time, increasing levels of lactase persistence tended to align with population busts linked to famines in particular regions, the researchers report. Between 8,000 and 4,000 years ago, excavated farming sites across Europe display signs ofEstimates of settlement density, a measure of how closely together people lived, also tended to decline at times of increasing lactase persistence.
日本 最新ニュース, 日本 見出し
Similar News:他のニュース ソースから収集した、これに似たニュース記事を読むこともできます。
5 credit card mistakes to avoid during tough timesHaving a plan may help you avoid debt or keep it manageable when money is tight.
続きを読む »
Curing Debilitating Genetic Diseases: “Soft” CRISPR May Offer a New Fix for Genetic DefectsTargeted repairs with ‘nicks’ of single DNA strands provide the foundation for novel disease therapies. One of the great challenges of modern medicine is curing debilitating genetic diseases. The development of CRISPR technologies and advancements in genetics research over the past decade has bro
続きを読む »
Monkeypox: wealthy countries must avoid their COVID-19 mistakesHaving ignored the disease for decades, high-income countries must share vaccines and treatments quickly with other nations.
続きを読む »
Ancient Europeans farmed dairy—but couldn’t digest milkA new study combines large archaeological data sets on dairy farming with ancient DNA and finds that across Europe, people consumed dairy for millennia before lactase persistence into adulthood was widespread.
続きを読む »