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She said she hopes Disney’s decision triggers similar changes with other companies.

Disney’s announcement really puts a lot of pressure on Nickelodeon and Cartoon Network and other media to do the same,” she said.

The latest push by Disney is an extension of the internal nutrition guidelines the company launched in 2006 with the goal of making 85 percent of the food and drinks served at its parks and resorts healthful. The remaining 15 percent was reserved for special treats, such as cake for birthday celebrations. The company also stopped using toys in children’s meals to advertise its movies, Mr. Iger said.

Visitors to parks and resorts also were given the option of trading out soda and fries for low-fat milk and fruit. Disney said 60 percent of the meals served now include those healthier options.

The company on Tuesday also introduced its “Mickey Check” seal of approval for nutritious foods sold in stores, online and at its parks and resorts.

“The emotional connection kids have to our characters and stories gives us a unique opportunity to continue to inspire and encourage them to lead healthier lives,” Mr. Iger said.