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A recent study indicates that an increase in body weight is responsible for about 4% of all cancer cases worldwide and a significant proportion of malignancies diagnosed in developing countries.
In 2012, weight gain was responsible for 544,300 cancer cases diagnosed each year worldwide, the researchers noted in the Census Journal for Clinicians. While overweight and obese people accounted for only 1% of cancers in low-income countries, they accounted for 7-8% of cancers diagnosed in some Western high-income countries, as well as in the Middle East and the Middle East. North Africa.
"Many people ignore the relationship between weight gain and cancer," said Huawana Song, head of the American Cancer Society's study group in Atlanta. "Trying to maintain and maintain a healthy weight is important and can reduce the risk of cancer."
Researchers have indicated that the proportion of overweight and obese people has increased worldwide since the 1970s. In 2016, 40% of adults and 18% of school-aged children were overweight or obese over 2 billion. adults and 340 million children worldwide.
The researchers said that while the proportion of overweight people in most countries and in all population groups, this increase was more pronounced in some low- and middle-income countries with a Western lifestyle with little activity. physical and many unhealthy foods.
A close relationship between them
"The simultaneous increase in weight gain in almost all countries has been largely influenced by changes in the global diet, focusing on energy-rich foods and nutritional value, as well as reducing the opportunities for weight gain. Physical activity, "said Song.
Overweight and obesity are closely related to an increased risk of 13 types of tumors: bad, colon, rectum, uterus, esophagus, gallbladder, kidneys, liver, ovaries, pancreas, stomach, thyroid , brain, spinal cord and blood cells.
More recently, some research has badociated weight gain with prostate cancer, as well as cancer of the mouth and throat.
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