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Obesity Epidemic Linked To Brain Mechanisms

Arnold

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Obesity Epidemic Linked To Brain Mechanisms
by Christian Nordqvist

America's rising rates of obesity in virtually all age groups is partly due to biological factors, researchers from the Cincinnati Diabetes and Obesity Center reported in the journal Cell Metabolism. Approximately one third of all American adults are obese today, and the percentage continues to rise, says the CDC (Centers for Disease Control and Prevention).

Co-author, Randy Seeley, PhD, said:

"While we don't usually think of it this way, body weight is regulated. How much we weigh is influenced by a number of biological systems, and this is part of what makes it so hard for people to lose weight and keep it off.

To understand the obesity epidemic, we must figure out how our environment alters these biological systems to encourage weight gain."

In our society today, there is an over-abundance of calorie-rich, high-fat foods, which encourages weight gain. What we consume can change parts of our brain that regulate how much we weigh.
High-fat diets inhibit the actions of leptin in the brain

Dr. Seeley explained:

"Leptin is a key hormone that is secreted from fat tissue, or adipose tissue, and its main function is to inhibit appetite. Via a number of molecular mechanisms, eating a high-fat diet reduces the actions of leptin in the brain. This miscommunication can lead to increased food intake and weight gain.

Evolutionary speaking, we are designed to want to eat foods that are high in fat and gain weight because it made it easier to survive times when food was not available," he continues. "However, that is no longer a real concern since food is almost always available, but we still have a biological desire to eat these calorically dense foods. So, how do we intervene and change this drive? "

Obesity not only has adverse health consequence, but financial and social ones too. Seeley believes there are a number of key points in successful therapeutic interventions which need to be applied.

Dr. Seeley said:

"The key issue is to find ways to take these biological systems that usually make it hard to lose weight and make them work for us to so that it is easier for obese individuals to lose weight," he says. "As we understand the molecular interaction between what we eat and these brain circuits that regulate our body weight, we can design interventions that reduce the body weight that our bodies defend.

This will mean that people trying to lose weight would be able to work with their biology, rather than trying to use will power to overcome their biology that pushes them back to their obese state. Such an endeavor will ultimately require a wide range of scientists from different fields to reduce both the human and monetary costs of the obesity epidemic."
 
Its really bad in the Midwest. Coming from Cali, I couldn't believe it. I'd say 1 of 3 people out here suffer from obesity. There are to many buffets! They just now changed the lunch menus at the grammar school and high school level just last year. It's pretty sad to see. I think 4 of 5 people are addicted to Soda and have no clue what a proper diet is..
 
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