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East Asians sweat more, study shows

Humans sweat more than any other animals and a research revealed today that East Asians sweat more than other people due to a genetic change.

Researchers from Fudan University and Harvard University discovered that a gene, known as EDAR370A, occurred in East Asians more than 30,000 years ago and it changed the East Asian ancestors' teeth, sweat glands, hair density and thickness. The research finding was published by Cell, a biweekly publication of exceptional research articles, today.

The proportion of East Asians containing the gene variation increased rapidly and 95 percent Chinese Han nationality population have reported the genetic change.

Fudan University researchers studied 2,500 Chinese Han people and found the gene variation made people's sweat gland density increased by 15 percent and made people's hair becomes more dense.

Jin Li, one of the researchers and director of the Fudan Univerisity's Key Laboratory of Modern Anthropology, said that the East Asian ancestors first arrived at Southeastern Asia about 30,000 years ago. The improvement of sweating abilities made the Eastern Asians adapted themselves better to the environmental change, he said.

He said the genetic change occurred to help people adapt themselves to the environment and such kind of evolution caused the difference between Asians people and other people.

The research shows that a single genetic change will cause multiple change on people's appearance and only a few genetic change can cause the huge difference between East Asians and other people, he added.

The research group will continue to studies to reveal the biological mechanisms which caused the difference between different species.


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