While not particularly light in calories (184 per half cup, mashed), avocados can be your BFF. The 17 grams of fats, mostly the healthy kind, keep you satisfied and heck, losing weight isn't always about calories anyway. "A recent study found that people on a high-fiber diet lost just as much weight as people on a calorie-reduced diet," says Zuckerbrot. Spread some on toast for a tasty lunch.
Banana Nut Muffin Quest Bar
How many you should eat: 1 (13 grams)