First of all: it ain't the food you eat that makes you fat. It's the number of calories you consume versus the calories you expend that makes you fat.
There are TONS of other things involved in that that will contrive to make you want to eat more calories than you expend, however. Likewise, there are strategies you can consider to help you beat that system.
Here's an excerpt from a Weight Watchers article Note: you can only get that article if you have a paid subscription to Weight Watchers, so sorry:
All of the study's participants were enrolled in Weight Watchers Meetings in Paris, France. One group of 30 overweight women was instructed to follow the POINTS Food System. Another group of 35 women also followed the POINTS Food System, but were given additional information about low-glycemic-index (GI) foods and told to eat at least one low-GI food with each meal.
All of the women participating in the study had their weights taken and a variety of tests, including blood tests, body composition, food journals and appetite/hunger scores, were performed throughout the 12-week trial.
The Results
After 12 weeks, both groups lost a significant amount of weight (about 5% of their initial weight). Both groups also had significant improvements in many health-related measures, including lower insulin and cholesterol levels, decreased blood pressure and reduced body fat.1 There was no difference between the two groups for weight loss or for any of the health parameters that were evaluated, indicating that the emphasis on low-GI foods had no effect on these measures. However, the group that had the focus on low-GI foods did report decreased feelings of hunger and increased satiety.
Read more about the Glycemic Index here as well as this abstract. It ain't the food ... entirely. But food makes a difference. Other things that can make a difference involve making smart substitutions, such as going for things that have more fiber and nutrition but lower calories. Returning snack food to the status of "treats", meaning it's okay to have one every now and then, but not as staples.
Be smart.
