Three years in and still going strong, the first lady's campaign against childhood obesity is causing many of the food industry's heavy hitters to change the way they do things.

Wal-Mart is putting special labels on some store-brand products to help shoppers quickly spot healthier items. Millions of schoolchildren are helping themselves to vegetables from salad bars in their lunchrooms, while kids' meals at Olive Garden and Red Lobster restaurants automatically come with a side of fruit or vegetables and a glass of low-fat milk.

Nutrition advocates and others are giving Michelle Obama credit for using her clout to help bring a range of interests to the table. They hope the increased awareness she has generated through speeches, her garden and her physical exploits will translate into further reductions in childhood obesity rates long after she leaves the White House.

About one-third of U.S. children are overweight or obese, which puts them at increased risk for any number of life-threatening illnesses, including diabetes, high blood pressure and heart disease.

Three years in and still going strong, the first lady's campaign against childhood obesity is causing many of the food industry's heavy hitters to change the way they do things.

Wal-Mart is putting special labels on some store-brand products to help shoppers quickly spot healthier items. Millions of schoolchildren are helping themselves to vegetables from salad bars in their lunchrooms, while kids' meals at Olive Garden and Red Lobster restaurants automatically come with a side of fruit or vegetables and a glass of low-fat milk.

Nutrition advocates and others are giving Michelle Obama credit for using her clout to help bring a range of interests to the table. They hope the increased awareness she has generated through speeches, her garden and her physical exploits will translate into further reductions in childhood obesity rates long after she leaves the White House.

About one-third of U.S. children are overweight or obese, which puts them at increased risk for any number of life-threatening illnesses, including diabetes, high blood pressure and heart disease.

While there is evidence of modest declines in childhood obesity rates in some parts of the country, the changes are due largely to steps taken before the first lady launched "Let's Move" in February 2010.

With the program entering its fourth year, Mrs. Obama embarked Wednesday on a two-day promotional tour with stops in Mississippi, Illinois and Missouri. She has been talking up the program on daytime and late-night TV shows, on the radio and in public service announcements with Big Bird. She also plans discussions next week on Google and Twitter.

"We're starting to see some shifts in the trend lines and the data where we're starting to show some improvement," the first lady told SiriusXM host B. Smith in an interview broadcast Tuesday. "We've been spending a lot of time educating and re-educating families and kids on how to eat, what to eat, how much exercise to get and how to do it in a way that doesn't completely disrupt someone's life."

She's not trying to point fingers, she's trying to get people to focus on solutions.

- Mary Sophos of the Grocery Manufacturers Association

Larry Soler, president and chief executive of the Partnership for a Healthier America, said Mrs. Obama has "been the leader in making the case for the time is now in childhood obesity and everyone has a role to play in overcoming the problem." The nonpartisan, nonprofit partnership was created as part of "Let's Move" to work with the private sector and to hold companies accountable for changes they promised to make.

Conservatives accused Mrs. Obama of going too far and dictating what people should — and shouldn't — eat after she played a major behind-the-scenes role in the passage in 2010 of a child nutrition law that required schools to make foods healthier. Former Alaska Gov. Sarah Palin, the Republican Party's vice presidential nominee in 2008, once brought cookies to a school and called the first lady's efforts a "nanny state run amok."

Other leaders in the effort, such as New York Mayor Michael Bloomberg, have felt the backlash, too. Last fall, Bloomberg helped enact the nation's first rule barring restaurants, cafeterias and concession stands from selling soda and other high-calorie drinks in containers larger than 16 ounces.

Despite the criticism, broad public support exists for some of the changes the first lady and the mayor are advocating, according to a recent Associated Press-NORC Center for Public Affairs Research poll.

More than eight in 10 of those surveyed, 84 percent, support requiring more physical activity in schools, and 83 percent favor government providing people with nutritional guidelines and information about diet and exercise. Seventy percent favor having restaurants put calorie counts on menus, and 75 percent consider overweightness and obesity a serious problem in this country, according to the Nov. 21-Dec. 14 survey by telephone of 1,011 adults.

Food industry representatives say Mrs. Obama has influenced their own efforts.

Mary Sophos of the Grocery Manufacturers Association, which represents the country's largest food companies, including General Mills and Kellogg's, said an industry effort to label the fronts of food packages with nutritional content gained momentum after Mrs. Obama, a mother of two, attended one of their meetings in 2010 and encouraged them to do more.

"She's not trying to point fingers," Sophos said. "She's trying to get people to focus on solutions."

A move by the companies signaling willingness to work with Mrs. Obama appears to have paid off as the Obama administration eased off some of the fights it appeared ready to pick four years ago.

Based on reporting by the Associated Press.

Follow us on twitter.com/foxnewslatino
Like us at facebook.com/foxnewslatino