Sweet potatoes are sweet, starchy root vegetables that are grown worldwide (1).
They come in a variety of sizes and colors — including orange, white, and purple — and are rich in vitamins, minerals, antioxidants, and fiber.
Not to mention, they provide a number of health benefits and are easy to add to your diet.
Here are 6 surprising health benefits of sweet potatoes.
Sweet potatoes are a great source of fiber, vitamins, and minerals.
One cup (200 grams) of baked sweet potato with skin provides (2):
Free radicals are unstable molecules that can damage DNA and trigger inflammation.
Summary Sweet potatoes are starchy root vegetables that are rich in fiber, vitamins, and minerals. They’re also high in antioxidants that protect your body from free radical damage and chronic disease.
The fiber and antioxidants in sweet potatoes are advantageous to gut health.
Sweet potatoes contain two types of fiber: soluble and insoluble (8).
Your body cannot digest either type. Therefore, fiber stays within your digestive tract and provides a variety of gut-related health benefits.
Some soluble and insoluble fibers can also be fermented by the bacteria in your colon, creating compounds called short-chain fatty acids that fuel the cells of your intestinal lining and keep them healthy and strong (10, 11).
The antioxidants in sweet potatoes may provide gut benefits as well.
Greater amounts of these types of bacteria within the intestines are associated with better gut health and a lower risk of conditions like irritable bowel syndrome (IBS) and infectious diarrhea (17, 18, 19).
Summary Sweet potatoes contain fiber and antioxidants that promote the growth of good gut bacteria and contribute to a healthy gut.
Sweet potatoes offer various antioxidants, which may help protect against certain types of cancers.
Anthocyanins — a group of antioxidants found in purple sweet potatoes — have been found to slow the growth of certain types of cancer cells in test-tube studies, including those of the bladder, colon, stomach, and breast (3, 20, 21).
However, studies have yet to test these effects in humans.
Summary Animal and test-tube research suggests that the anthocyanins and other antioxidants found in sweet potatoes may protect against certain cancers. However, human studies are needed.
Sweet potatoes are incredibly rich in beta-carotene, the antioxidant responsible for the vegetable’s bright orange color.
In fact, one cup (200 grams) of baked orange sweet potato with skin provides more than seven times the amount of beta-carotene that the average adult needs per day (2).
Severe vitamin A deficiency is a concern in developing countries and can lead to a special type of blindness known as xerophthalmia. Eating foods rich in beta-carotene, such as orange-fleshed sweet potatoes, may help prevent this condition (27).
Purple sweet potatoes also seem to have vision benefits.
Summary Sweet potatoes are rich in beta-carotene and anthocyanins, antioxidants that may help prevent vision loss and improve eye health.
Consuming purple sweet potatoes may improve brain function.
No studies have been done to test these effects in humans, but in general, diets rich in fruits, vegetables, and antioxidants are associated with a 13% lower risk of mental decline and dementia (34, 35).
Summary Animal studies have shown that sweet potatoes may improve brain health by reducing inflammation and preventing mental decline. However, it remains unknown whether they have the same effects in humans.
It’s also key for maintaining healthy mucous membranes, especially in the lining of your gut.
The gut is where your body is exposed to many potential disease-causing pathogens. Therefore, a healthy gut is an important part of a healthy immune system.
Studies have shown that vitamin A deficiency increases gut inflammation and reduces the ability of your immune system to respond properly to potential threats (39).
No studies have been conducted to determine whether sweet potatoes, in particular, have an effect on immunity, but eating them regularly can help prevent vitamin A deficiency (40).
Summary Sweet potatoes are an excellent source of beta-carotene, which can be converted to vitamin A and help support your immune system and gut health.
Sweet potatoes are very easy to add to your diet.
They can be enjoyed with or without the skin and can be baked, boiled, roasted, fried, steamed, or pan-cooked.
Their natural sweetness pairs well with many different seasonings, and they can be enjoyed in both savory and sweet dishes.
Some popular ways to enjoy sweet potatoes include:
Summary Sweet potatoes are a versatile root vegetable that can be prepared in many ways.
Sweet potatoes are nutrient-dense root vegetables that come in a variety of colors.
They’re high in fiber and antioxidants, which protect your body from free radical damage and promote a healthy gut and brain.
They’re also incredibly rich in beta-carotene, which is converted to vitamin A to support good vision and your immune system.
Sweet potatoes are versatile and can be prepared in both sweet and savory dishes, making them an exceptional carb option for most people.