First Lady Michelle Obama announces the new guidelines for public school lunches and puts three sample dishes to the test! Real kids share their thoughts on the updated menu and question the First Lady about life in the White House.

Recorded on August 29, 2012. 

Click here for Part 1 of Michelle Obama’s School Lunch Taste-Test.

Click here to read updated fitness and nutritional guidelines.

Click here to see photos of Michelle Obama’s visit to The Dr. Oz Show.

Click here to see the Michelle Obama discuss her crusade against America’s childhood obesity epidemic.

Click here to watch the First Lady answer your questions.

What's Really Causing Your Obesity: Nature or Nurture?

It's more complex than too many calories and not enough physical activity.

The American Medical Association officially recognized obesity as a disease in 2013. But in the past 13 years, there's not been much of a shift in the understanding of what causes obesity — not in the general public, in people who contend with the condition or in the practice of medicine. Most people still think of obesity as a character flaw caused by too many calories and not enough physical activity. But it's much more complex than that.

A study analyzing National Health and Nutrition Examination Survey (NHANES) data found that even though US adults' BMI increased between 1988 and 2006, the amount of calories adults consumed and the energy they expended were unchanged. It also appears that the quality of calories consumed (low versus high glycemic index) is as important a consideration as the total quantity. And genetics only explains about 2.7% variation in people's weight, according to a study in Nature. That all adds up to this: The two most common explanations for obesity — calories in, calories out and family history — cannot, by themselves, explain the current epidemic.

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