TORONTO –

A new app that lets users shed virtual weight so their faces look skinnier on selfie photos is raising concerns about health and body-image issues.

SkinneePix, for iPhone and Android devices, can trim from 5-15 pounds (2-6 kg) of virtual fat for a slimmer selfie look.

"Cameras add additional weight to photos and when you're taking a selfie you're also dealing with bad lighting, angles, close-ups and a lot of other factors that make people complain that the photo isn't an accurate representation of themselves," said Susan Green, co-founder of the Phoenix-based company Pretty Smart Women that created the app.

It was originally designed to help overweight adults show a leaner version of themselves, but Robin Phillips, the other co-founder, said the app has also motivated people to lose weight.

"It's a good reminder to get off the couch, turn the TV off, and go for a walk," she said.

But some critics fear the $1.99 app, which only works on single head shots, could encourage an unhealthy body image.

Lauren Dickson, a social worker in the eating disorders and addiction clinic at the Center of Addiction and Mental Health in Toronto, said the app is one of many factors that could contribute to a young adult developing an eating disorder.

"The media obviously has some effect on people developing eating disorders, but it's not the only variable. It's one of many factors," she said.

"The majority of young girls wouldn't develop an eating disorder because of an app like this, but some might be more vulnerable and it could contribute," Dickson added.

Green said the virtual weight loss in the app is capped at 15 pounds and the app focuses only on the face and not the entire body.