fruit may be "healthy" for you, but too much fructose from fruit or other highly processed foods will cause you to gain fat!

from http://www.rejuvenation-science.com/n_hfcs-fat.html:

"Dr. Elizabeth Parks, associate professor of clinical nutrition and lead author of a study appearing in the Journal of Nutrition, said her team's findings suggest that the right type of carbohydrates a person eats may be just as important in weight control as the number of calories a person eats.

Current health guidelines suggest that limiting processed carbohydrates, many of which contain high-fructose corn syrup, may help prevent weight gain, and the new data on fructose clearly support this recommendation.

"Our study shows for the first time the surprising speed with which humans make body fat from fructose," Dr. Parks said. Fructose, glucose and sucrose, which is a mixture of fructose and glucose, are all forms of sugar but are metabolized differently.

"All three can be made into triglycerides, a form of body fat; however, once you start the process of fat synthesis from fructose, it's hard to slow it down," she said."

here's a link to the abstract:  http://www.ncbi.nlm.nih.gov/pubmed/18492831?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum