The Difference Between Simple Carbs and Complex Carbs

The Difference Between Simple Carbs and Complex Carbs

As you likely know by now, not all carbs are created equal: Some are “better” than others, while some add almost no nutritional value to your diet.

Whether you love carbohydrates or choose to limit them, you need to know how to tell the difference between simple carbs and complex carbs.

Keep reading for the lowdown on complex carbs vs. simple carbs, why fiber matters, and the best carbs for a healthy diet.

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Simple vs. Complex Carbs: What’s The Difference

carbs, what are carbs, simple carbs, complex carbs

First, let’s define carbs:

  • Carbohydrates are one of the three macronutrients — protein and fat being the others. Carbohydrates, or carbs for short, are a significant source of energy for your body.
  • Complex carbs are usually whole foods that contain fiber.
  • Simple carbs most often contain added sugar, and many are void of fiber, with the exceptions that include whole fruit.

Complex Carbs

Complex carbohydrates are different from simple carbs in that they’re made up of longer chains of sugars. Because of this, they take more time to break down, which allows for a slower, more gradual release of energy. Whole grains, beans, legumes, and starchy vegetables are all examples of complex carbohydrates. Most complex carbs have fiber and vitamins, minerals, and phytonutrients in addition to providing energy in the form of calories.

The carbs we eat should mainly fall under the complex category, along with naturally occurring simple carbs (fruit, vegetables, and milk) instead of refined carbs (white bread, pasta, etc.) or foods with added sugars (candy, soda, and baked goods).

Simple Carbs

So if fiber may be an indicator of a complex carb, what are simple carbs? Mostly, they’re carbohydrates that are quickly digested, low in fiber and nutrients, and potentially high in added sugar. Think: refined, overly processed “white” grains and foods or drinks with added sugars. They’re basically carbs that aren’t whole foods found in nature.

Simple carbs are basic, short-chained groups of sugars. Because they’re made up of shorter chains, it’s easier for them to break down in your body, which results in a sudden rush of energy (also a potential spike in blood sugar) soon after you eat them.

This doesn’t mean that all simple carbs are refined; some are found in whole foods. Fruit and milk are made up of naturally occurring simple sugars, but they also provide vitamins and minerals (and, in the case of whole fruit, not fruit juice, contain fiber).

On the other hand, more processed foods and beverages like candy bars and soda are simple sugars that come from added sugars. These “junk foods” don’t offer many added nutritional benefits beyond the calories (or energy) they provide. Simple carbs are usually treats, not foods that you should not include in your everyday diet.

There can be a place for these types of carbs in the diet, for example, as fuel before or after a workout. It’s important that athletes have quickly digestible carbs, which is why you often see them drinking sugary beverages or eating candy before, during, or after races. Those simple sugars can be stored as glycogen, which their bodies can then rapidly convert to energy as needed. While athletes wouldn’t fuel their bodies with these sugary foods all the time, there is a time and place for them.

In general, however, these carbs should be limited because they most often do not contain many nutritional benefits and can be high in added sugars.

Finding Balance

Openfit recommends a balance of roughly 40 percent carbohydrates and 30 percent each of protein and fat, which is great for either weight loss or maintaining your current healthy lifestyle.

If you had to assign a Facebook relationship status to carbs, the most appropriate one would likely be: “It’s complicated.” Understanding carbs — and which ones should be limited in your diet — can be tricky because there are different types and so many aspects to consider: simple vs. complex carbs, sugar vs. starch, and even soluble vs. insoluble fiber. In the case of carbs, complex is better.

When it comes to simple vs. complex carbs, we should be eating more of the former than the latter. Why should we eat more complex carbohydrates than simple carbohydrates?

While these two classifications are not synonymous with “healthy” carbs and “unhealthy” carbs per se (more on that later), they are indicative of the chemical structure of these carbs and how easily your body breaks them down.

 

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Complex Carbs vs. Simple Carbs: Food Sources

The sources of simple vs. complex carbs are very different.

Complex carbs often provide fiber, vitamins, minerals, and phytochemicals, and they are plant-based. Most foods containing complex carbohydrates can be found in the perimeter of your grocery store where the fresh, whole foods are stocked.

  • Amaranth
  • Bananas
  • Blueberries
  • Black beans
  • Cantaloupe
  • Cucumber
  • Kale
  • Millet
  • Pears
  • Pinto beans
  • Quinoa
  • Red lentils
  • Spinach
  • Strawberries
  • Sweet potatoes
  • 100% whole grain bread and pasta

Commonly found in the processed pre-packaged foods, you’ll buy simple carbs in the middle portion of the grocery store, as well as convenience stores. They include:

  • Sugars
  • Syrups
  • Glucose
  • Fructose

Carbohydrates You Should Limit

Americans are overdoing it when it comes to added sugars. The American Heart Association recommends that women limit the amount of added sugar in their diet to six teaspoons per day (that’s about 100 calories) and nine teaspoons per day for men (about 150 calories). Current research estimates that we’re eating more than 20 teaspoons (about 350 calories) of added sugar each day! These are some of the more common sugary carbs to limit:

  • Candy
  • Chocolate candy bars
  • Cola and other sodas, as well as other sweetened beverages like tea and coffee
  • Pastries, cupcakes, and most baked goods
  • Refined white bread and pasta
  • Sports drinks (except when used by endurance athletes)

 

How to Choose Your Carbohydrates

carbs, what are carbs, simple carbs, complex carbs

If you’re going to maintain a healthy diet, you need to know nutrition facts labels can tell you a lot when it comes to understanding simple vs. complex carbohydrates in food. First, start with the ingredients, which are listed in order by weight, from greatest to least.

Look for ingredients that include whole grains, whole wheat, whole fruit, or vegetables, and do not contain added sugar like high-fructose corn syrup, maltose, brown sugar, etc.

Whole fruit is a safe bet when it comes to good carbs. Avoid fruit canned in syrup as well as frozen and dried fruit with added sugars. Also, fruit juice may offer nutrients but is void of fiber, so you’ll want to limit the amount you drink.

It’s also important to look at the actual nutrient content in the food. Total carbohydrates are listed on the label along with fiber, sugar, and added sugars. As of July 2018, the Food and Drug Administration will require that sugars be broken down to show which are naturally occurring (e.g., lactose from milk and fructose from fruit) and which are added sugars.

Before you cut out carbs completely (or start filling up your plate), read: Are Low-Carb Diets Effective for Weight Loss?

The Final Word on Carbs

Carbs play an important role in a healthy diet when eaten in the right portions. Be sure you’re choosing complex carbs over simple ones — though you can reserve those for a rare treat if you prefer.

Kelly Plowe

About

Kelly is a Philadelphia-based licensed dietitian nutritionist, gut health educator and FODMAP diet specialist. Follow her on Twitter.

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