Sunday March 24, 2019

Overweight in Middle Age Linked to Low Breast Cancer Risk

At ages 25 to 34, each five-unit increase in BMI was linked to 15 per cent lower risk

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Cancer
Cancer Ribbon. Pixabay

While obesity has been shown to increase breast cancer risk in elderly, for younger women the opposite seems to be true. For pre-menopausal women, a higher body fat was linked to lower breast cancer risk, according to researchers.

The study, published in the journal JAMA Oncology, showed that there was 23 per cent lower breast cancer risk linked to each five-unit increase in body mass index (BMI) between the ages of 18 and 24.

At ages 25 to 34, each five-unit increase in BMI was linked to 15 per cent lower risk.

There was a 13 per cent lower risk for BMI at ages 35 to 44, and a 12 per cent lower risk for BMI at ages 45 to 54 years.

“We saw a trend where, as BMI went up, cancer risk went down. There was no threshold at which having a higher BMI was linked to lower cancer risk,” said Hazel B. Nichols, assistant professor at the University of North Carolina.

Cancer
Representational image. Pixabay

The trend could be attributed to multiple factors such as differences in hormones, including estrogen — primary female sex hormone — growth factors, or breast density, Nichols said.

Estrogen has known to be a key driver of breast cancer. But, the small amount of estrogen produced by fat tissue before menopause may help tell the ovaries that they can produce less estrogen and also regulate other hormones or growth factors, Nichols said, adding that after menopause, women with higher adipose tissue have higher estrogen levels and usually a higher breast cancer risk.

“In young women, estrogen is one factor that contributes, but it’s not the whole story,” she noted.

Also Read: Cancer: Salient Features of The Killer Disease

For the study, the team pooled data from 19 different studies to investigate breast cancer risk for a group of 758,592 women who were younger than 55 years.

However, “this study is not a reason to try to gain weight to prevent breast cancer. Heavier women have a lower overall risk of breast cancer before menopause, but there are a lot of other benefits to managing a healthy weight that should be considered,” Nichols noted. (IANS)

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Research Reveals: It’s Your Friend’s Company That Can Turn You Obese

Social contagion in obesity means if more people around you are obese, then that may increase your own chances of becoming obese.

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Unhealthy food promotes obesity. pixabay

Besides genes and an unhealthy diet, your friends can also play a role in making you overweight, says a study, which found that obesity can spread through communities like a ‘social contagion’.

The study showed social circles can influence a person to become obese, suggesting the risk of becoming overweight increases if one moves to an area with a high rate of obesity, the Daily Mail reported.

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On the other hand, the risk of the parent becoming obese or overweight went up five per cent for increase in every one per cent of obesity in the area. Pixabay

“Social contagion in obesity means if more people around you are obese, then that may increase your own chances of becoming obese. Subconsciously, you are affected by what people around you are doing,” said Ashlesha Datar at the University of Southern California.

“If you move to a community where a sedentary lifestyle is the norm, you join that. There is this social influence,” Datar said.

For the study, the team included 1,314 parents and 1,111 children of US Army personnel at 38 bases.

The chances of becoming overweight or obese for a teenager increased four-six per cent for rise in every one per cent in the obesity.

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If you move to a community where a sedentary lifestyle is the norm, you join that. There is this social influence,” Datar said. Pixabay

On the other hand, the risk of the parent becoming obese or overweight went up five per cent for increase in every one per cent of obesity in the area.

Also Read: Authorities Scroll Through Social Media Violations Of Laws Restricting Political Parties, As It Forms Thailand’s Election “War Room”

The longer the families lived there, the more likely they put on weight, the report said.

Obesity can be caused by many variables, and previous research has shown living in certain communities carries a higher risk of obesity than living in other communities. (IANS)