What Exactly Is Resistant Starch And What Foods Have It?

Because I’m always down for more carbs.

Caroline Praderio |

If you love keeping up with the latest food trends, you may have heard the term “resistant starch” buzzing. While research is still in early days, resistant starch has been linked to some legit health benefits. The best part? It’s found in foods you’re probably already eating (carbs!).

Never heard of resistant starch before? Here’s the deal: “Resistant starch is a type of fibre found in some starchy foods,” says Dr Mindy Patterson, a nutrition researcher and assistant professor of nutrition at Texas Women’s University. While most starch gets broken down into glucose, resistant starch, well, resists digestion and can’t be broken down. Intrigued? There’s so much more to know about resistant starch.

It could keep your gut healthy.

Studies have shown that increased resistant starch intake may lead to a more diverse (a.k.a. healthier) gut microbiome. That’s because resistant starch foods contain prebiotic fibres which “ferment in your colon and feed the good bacteria in your gut,” Patterson explains. (For a refresher, prebiotics are food for probiotics, the good bacteria in your gut.)

READ MORE: These Are The 20 Best Fat-Burning Foods Of All Time

Resistant starch may have long-term health benefits.

So far, the research on resistant starch is promising. In addition to promoting a healthy gut, it’s been shown to increase insulin sensitivity, boost digestive health, and improve blood sugar control.

To reap these benefits, Patterson recommends including a serving of one of the foods below in at least two meals per day. She also points out that these benefits are linked to long-term, regular consumption of resistant starch—you can’t just eat a serving of cold potatoes and expect magic to happen.

Cooking and temperature matter.

Speaking of cold potatoes, how you cook your resistant starch foods matters. That’s because heat can affect the structure of starch molecules. For example, “when you cook a potato, heat opens up the starch granule and makes it more accessible to our digestive enzymes,” Patterson says. When this happens, the starch enters the bloodstream as glucose—a.k.a. sugar.

On the other hand, “when you cook a potato and then chill it, that starch granule closes up,” she says. “Since it can’t be broken down by enzymes, it doesn’t enter the bloodstream as glucose, it enters the colon and can be fermented by bacteria.” In other words, that’s how it becomes a prebiotic.

That said, it varies from food to food. (Check out our prep tips for each food in the list below.)

READ MORE: 5 Foods High in Probiotics (That Aren’t Yogurt)

Want to add more to your diet? Try these resistant starch foods:


The starch in hot potatoes is easy to break down, so you’ll need to eat your cooked potatoes cold in order to get resistant starch. To make this palatable, Patterson suggests serving them in a potato salad. (Because, plain cold potatoes? Hard pass.)


Good news for those who like their food hot: Serving beans and legumes hot maximizes their resistant starch content, says Patterson, although they still contain resistant starch while cold. So, you’ll get a little bit of resistant starch from hummus and bean salad, but more from warm dishes like chilli or chana masala.


As bananas ripen, much of the starch gets converted to sugar (that’s why they’re sweetest when they’re super ripe and brown). So, unripe green bananas are starchy, and much of this is resistant starch. Eating less-sweet bananas may take some getting used to, but try slicing one over slightly sweet cereal, or a yoghurt parfait.


As with potatoes, the starch in rice is converted to resistant starch as it cools. Because cold leftover rice sounds terrible, Patterson points out that reheated rice, specifically fried rice, is still high in resistant starch.


While cooked and cooled oats pack the most resistant starch, you can still get quite a bit from a warm bowl of just-cooked oats. If you’re already eating oatmeal for breakfast, keep it up! If not, consider swapping it in for your regular breakfast a few times a week.


While several cooked whole grains contain resistant starch, Patterson calls out barley as a particularly good source. Because it doesn’t dry out as much as some other grains when cooked and chilled, barley is also a great candidate for cold grain salads.

This article was originally published on www.womenshealthmag.com

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