Having played a singing elephant on stages across the US, Cleo Berry is well acquainted with the vagaries of show business. But he still was stunned to learn that he had unwittingly become an amputee in advertisements that New York City is posting to warn of the dangers of diabetes.

Mr. Berry was a struggling young actor several years ago when he accepted $500 to pose for some photographs in a Manhattan studio. He had not given those pictures much thought until Friday night, when a friend alerted him that his image — minus one leg — was all over the Internet. An advertising agency for the city’s health department obtained the rights to use the photo to illustrate its campaign — shown throughout the subway system — against supersize portions of fast food and sugary sodas.
To emphasize that consuming too much of those foods could lead to diabetes and the amputation of limbs, the agency edited away the lower half of Mr. Berry’s right leg and conjured up a pair of crutches. “I was beyond shocked,” Mr. Berry said, recounting his reaction to seeing himself portrayed as ailing and crippled.
“I cried at my computer screen for, like, a minute.” Then, after studying the ad more closely, “I said: ‘Oh my gosh, they even gave me crutches. Come on, people.’ ”

Mr. Berry, 27, said he supported the city’s efforts to educate people about the dangers of diabetes, but he said he disagreed with the use of a manipulated image of an able-bodied person, instead of an image of a real victim of the disease. Although only the bottom of his face is shown in the ads, Mr. Berry said he was immediately concerned about the effect this depiction could have on his career as an actor. “I’ve always wanted my photo in an ad all over the city, but I was hoping it would be for a TV show or something, not — this,” Mr. Berry said.