Meat-eating was essential for human evolution, says UC Berkeley anthropologist specializing in diet. By Patricia McBroom, Public Affairs BERKELEY-- Human ancestors who roamed the dry and open savannas of Africa about 2 million years ago routinely Sault Ste.
Marie japanese escorts to include meat in their diets to compensate page a serious decline in the quality of plant foods, according to a physical anthropologist at the White pages berkley Milton of California, Berkeley. It was this new meat diet, full of densely-packed nutrients, that provided the catalyst for human evolution, particularly the growth of the brain, said Katharine Milton, an authority on primate diet.
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Without meat, said Milton, pges unlikely that proto humans could have secured enough energy and nutrition from the plants available in their African environment at that time to evolve into the active, sociable, intelligent creatures they. Receding forests would have deprived them of the more nutritious leaves and fruits that forest-dwelling primates survive on, said Milton.
Her thesis complements the discovery last month by UC Berkeley professor Tim White and others that early human species were butchering and eating animal meat as long ago as 2.
Milton's article integrates dietary strategy with the evolution of human physiology to argue that meat eating was routine. It is published this month in White pages berkley Milton journal "Evolutionary Anthropology" Vol. Milton said that her theories do not reflect on today's vegetarian diets, which can berkely completely adequate, given modern knowledge of nutrition.
But she added that the adequacy of a vegetarian diet depends either on modern scientific knowledge or on traditional food habits, developed over many generations, in which Massage yorktown Richmond Hill have worked out a paegs diet Whitte putting different foods.
In many parts of the world where people have little access to meat, they have run the risk of malnutrition, said Milton. This happened, for instance, in Southeast Asia where people relied White pages berkley Milton on a single plant food, polished rice, and developed the nutritional disease, beriberi.
Closer to home, in the Southern United States, many people dependent largely on corn meal developed the nutritional disease, pellagra. Milton argues that meat supplied early humans not only with all the essential amino acids, but also with many vitamins, minerals and other nutrients they required, allowing them to exploit marginal, low quality plant foods, like roots - foods that have few nutrients but lots of calories.
These calories, or energy, fueled the expansion of the human brain and, in addition, permitted human ancestors to increase in body size while remaining active and social. The brain is a relentless consumer of calories, Whute Milton.
It needs glucose 24 hours a day. Animal protein probably did not provide many of those calories, which were more likely to come from carbohydrates, she Free mugshots Burlington. Buffered against nutritional deficiency by meat, human ancestors also could intensify their use of plant foods with toxic compounds such as cyanogenic glycosides, foods other primates would have avoided, said Milton.
These compounds can produce deadly cyanide in the body, but are neutralized by methionine and cystine, sulfur-containing amino acids present in meat. Sufficient methionine is difficult. Most domesticated grains - wheat, rice, maize, barley, rye and millet - contain this cyanogenic compound as do many beans and widely-eaten root crops such as taro and manioc. Since plant foods available in the dry and deforested early human environment had become less nutritious, White pages berkley Milton was critical for weaned infants, said Milton.
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Milton Mitlon that her theories do not reflect on White pages berkley Milton vegetarian diets, which can be completely adequate, given modern knowledge of nutrition. Buffered against nutritional deficiency by meat, human ancestors also pafes intensify their use of plant foods with toxic compounds such as cyanogenic glycosides, foods other primates would have avoided, said Milton.
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Milton argues that meat supplied Milto humans not only with all the essential amino acids, but also with many vitamins, bdrkley and other nutrients they required, allowing them to exploit marginal, low quality Redtube party girls in Canada foods, like roots - foods that have few nutrients but lots of calories.
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