Snacks Quiz: Is Your Snack Supersized?

Without knowing the size of a healthy portion, it's easy to eat more than you realize or need. Big slices of pizza mean you could be getting lots of unhealthy saturated fats from too much cheese and non-lean meats. In just a two-piece snack, you could blow nearly half the amount of saturated fat you should have in a day. You don't have to banish pizza -- no food has to be off limits -- just eat reasonable portions (and don't make pizza an everyday snack). Being able to eyeball a healthy portion size will make that so much easier.

The amount of food served at most restaurants has gotten bigger over time. While it may seem like "getting more for you money" is good, your mind can trick you into eating more than you realize -- and more than your body needs. A reasonable portion of fries is about the size of a baseball, or 10 fries. While people's calorie needs vary, teens need, on average, about 2,000 calories a day. When you get 610 from fries, you've already eaten more than a quarter of your calories for the day, leaving less room for more nutritious foods.

Nuts can be a great snack. They have healthy fats and protein, which can help keep hunger away until your next meal. Just make sure you don't go overboard. A serving size of most nuts is 1/4 cup -- that's about the size of a golf ball. For almonds, one serving is about 23-25 nuts. But don't think you have to count every time. Do it once so you get the idea of what a serving looks like in your hand. Then do a spot check every once in a while to help you keep your portion sizes healthy.

That's more than double the size of 20 years ago! A serving of popcorn is actually 1 cup, about the size of a baseball -- that's just a handful. So typical movie theater popcorn has 11 servings. Talk about extreme eats! To avoid overeating, share a bag with friends and cut your portion down to just a few servings. And remember, the healthiest popcorn is plain (no butter or salt).

When eating packaged food, sometimes a package holds more than one serving. So when you think you're eating right, you could be eating two or more servings -- and double the calories, unhealthy fats, and salt. To know for sure, look near the top of the Nutrition Facts panel. You'll see serving size and, below that, "Servings Per Container." Be good to your body and dish out just one serving.

If you're having a bad day and reach for a handful of cookies to feel better, beware. Having one cookie is a better choice. Just make sure your cookie is about as wide as a soda can or water bottle. That's small enough to fit in most people's palms. (If you have a bigger palm, that doesn't mean you should go for a bigger cookie.) Some over-sized cookies sold today can have four times the calories and unhealthy saturated and trans fats of a reasonably sized cookie.

A king size bar or treat that comes with two bars or two pieces in a package is meant for sharing. Plus, a king size package can have up to 555 calories -- more than 25% of your daily calories in one snack. That's too much, considering that a candy bar doesn't provide you with many healthy nutrients and won't keep you energized or feeling full for long.