One study warns: Obesity is responsible for some cases of cancer

A recent study suggests that weight gain accounts for about 4% of all cancers worldwide and a large proportion of malignancies diagnosed in developing countries.

In the journal Canser Journal for Clinicians, the researchers said that in 2012, weight gain was responsible for 544,300 cancer cases diagnosed each year worldwide, while individuals suffering from overweight and d? obesity accounted for only 1% Cancer cases in low-income countries accounted for 7-8% of cancer cases diagnosed in some Western high-income countries, the Middle East and North Africa.

"Many people are unaware of the link between weight gain and cancer," said Song Huawana, who headed the study group of the American Cancer Society in Atlanta.

"Trying to maintain and maintain a healthy weight is important and can reduce the risk of cancer," she said.

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 on 2 billion adults and 340 million. Child around the world.

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-income and middle-income countries with a Western lifestyle with few physical activity and many unhealthy foods.

"The simultaneous increase in weight gain in almost all countries would be largely due to global diet shifts focused on energy-rich foods and nutritional value, as well as the reduction of the opportunities available to them." Physical activity, "said Song.

Excess weight and obesity are closely related to the increased risk of 13 types of tumors: breast, colon, rectum, uterus, esophagus, gallbladder, kidneys, liver, ovaries, pancreas, stomach, thyroid, brain, spinal cord and blood cells.

More recently, some research has associated weight gain with prostate cancer, as well as cancer of the mouth and throat.