Where do your groceries come from? If you're one of the 23.5 million Americans,
Rift Gold inclusive of 6.5 million children, who live more than one mile from a supermarket, your shelves might be stocked with food from the local convenience store. These "food deserts" impede access to healthy, affordable foods, such as fruits, vegetables and whole grains -- a key part in fighting the childhood obesity epidemic.

"It's impossible to make [healthy] changes if you have to get in a cab or bus or walk for miles to get a head of lettuce," First Lady Michelle Obama told AOL Health readers during her first-ever live web chat Tuesday.

Obama spoke with AOL Health to promote the newly redesigned "Let's Move!" website. RIFT Platinum The first lady launched the Let's Move! effort in February to bring together parents, schools and businesses to combat the growing childhood obesity epidemic. Currently, about 1 out of every 3 U.S. children is overweight or obese.

In February, the first lady put her Let's Move! rift gold campaign into action when she traveled to Philadelphia -- once labeled America's most obese city -- by announcing more than $400 million in federal assistance to help eliminate food deserts. By bringing grocery stores to underserved communities, residents will have better access to cheaper, healthier food options without having to travel or resort to convenience stores or fast food establishments.

The Fresh Grocer, a local supermarket now in the Philadelphia neighborhood Mrs. Obama visited back in February, is now the community's "shining star," the first lady told AOL Health. RIFT Platinum "The produce matches any high-priced grocery store in the country, and the store is turning a profit," she said. "If they can do it in Philadelphia with its rural and urban communities, they can do it anywhere."

More on Let's Move!
Explaining the First Lady's 'Let's Move' Campaign
Does Your Neighborhood Influence Your Weight?
Michelle Obama Chats Live With AOL Health About Childhood Obesity