1. Any snack that only contains carbs
When you eat crackers, dry cereal, bread, or rice cakes alone, your body converts the carbs to simple sugars and sends it directly into your blood stream. In response to the sugar rush, your body produces extra insulin, which helps your body absorb the sugar ASAP. The problem: You end up with low blood sugar and the same hunger pangs that led you to carb it up in the first place. You then may be inclined to reach for sugary foods with no nutritional value to satisfy your need for instant energy, says Charlie Seltzer, M.D., a weight-loss specialist based in Philadelphia, Pennsylvania.
Eat This Instead: Snacks that contain a combination of carbs, healthy fats, and protein. They take longer to digest, and will, therefore, tide you over for longer.
2. Frozen meals
To make fresh ingredients last extra long in your freezer, food manufacturers often load frozen meals with sodium, a natural preservative, Harvest says. Sodium makes you retain water, which bloats you up - so you won't look and feel your best regardless of how much weight you want to lose.
Also: When food manufacturers try to squeeze a meal's worth of calories into a teeny-tiny box, every bite ends up containing lots of calories by design, Harvest adds. While large portions trick your brain into thinking your body is full, the measly portions found in freezer meals are inherently unsatisfying, even though they contain plenty of calories.
Eat This Instead: Pre-frozen leftovers. Just double up on ingredients the next time you cook dinner, then cool and toss leftovers in a microwave-safe container to keep in your freezer for one to six months depending on what you're cooking. Or stock your freezer with frozen veggies and your protein of choice (like chicken breast tenders, which cook faster than full breasts, or veggie burgers) to whip up a meal in the same amount of time it takes to cook a premade microwave dinner.
3. High-fiber snack bars
Yes, everyone needs fiber - it keeps your digestive system churning and keeps you feeling full, even when you're cutting back on calories. What you don't need: Nearly one day's worth of fiber (about 25 grams) in one snack bar, with a diet that's otherwise devoid of it, Harvest says. "Fiber intake has to be consistent throughout the day to stave off hunger, improve digestive health, and not cause stomach upset."
Eat This Instead: Produce that's naturally rich in fiber - any fruit or veggie will do. Make produce a part of every snack and meal you eat throughout the day, and you'll get your daily dose of filling fiber, no problem.
4. "Low-fat" foods
research suggests that people tend to eat upward of 30 percent more when they know they're eating a food that's low in fat. The problem (besides overeating, which can quickly thwart your weight loss goals) is that when food makers remove fat from food, they inevitably remove some of the flavor. To compensate, they often add sugar, which makes the product even worse for you.
Eat This Instead: Healthy
fats in moderation. That means dipping your baby carrots in guacamole
(which is rich in monounsaturated fats) or hummus (often made with olive
oil, another good source of the same healthy fats) instead of fat-free
ranch.