Many overweight Americans are in denial about their weight and their poor diet.

Researchers for Consumer Reports studied a nationally representative sample 1,234 U.S. residents age 21 and older. Ninety percent of those people said their diet is unhealthy.

Sixty percent of those people were obese, but only 50 percent think they are.

Just one in 10 said their diet is unhealthy and only 11 percent considered themselves to be overweight or obese.

Regardless of their weight, researchers found most people are trying to eat right. Fifty-nine percent said they were either "careful" or "strict" about their food intake, while only 23 percent said they pretty much ate whatever they wanted.

The way food is marketed could be partly to blame. Dieticians say it's important to look at the ingredients, especially the amount of sugar in foods.

They also say it's important to eat fruits and vegetables and get plenty of moderate exercise.