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Author Topic: 6 Surprising Health Benefits of Sweet Potatoes  (Read 51 times)

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Offline smith95

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6 Surprising Health Benefits of Sweet Potatoes
« on: January 09, 2019, 03:40:38 pm »
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.

1. Highly Nutritious
Sweet potatoes are a great source of fiber, vitamins, and minerals.

One cup (200 grams) of baked sweet potato with skin provides (2):

Calories: 180
Carbs: 41.4 grams
Protein: 4 grams
Fat: 0.3 grams
Fiber: 6.6 grams
Vitamin A: 769% of the Daily Value (DV)
Vitamin C: 65% of the DV
Manganese: 50% of the DV
Vitamin B6: 29% of the DV
Potassium: 27% of the DV
Pantothenic acid: 18% of the DV
Copper: 16% of the DV
Niacin: 15% of the DV
In addition, sweet potatoes — especially the orange and purple varieties — are rich in antioxidants that protect your body from free radicals (3, 4, 5).

Free radicals are unstable molecules that can damage DNA and trigger inflammation.

Free radical damage has been linked to chronic illnesses like cancer, heart disease, and aging. Therefore, eating antioxidant-rich foods is good for your health (6, 7).

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.
2. Promote Gut Health
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.

Certain types of soluble fiber — known as viscous fibers — absorb water and soften your stool. On the other hand, non-viscous, insoluble fibers don’t absorb water and add bulk (9).

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).

Fiber-rich diets containing 20–33 grams per day have been linked to a lower risk of colon cancer and more regular bowel movements (12, 13, 14).

The antioxidants in sweet potatoes may provide gut benefits as well.

Test-tube studies have found that antioxidants in purple sweet potatoes promote the growth of healthy gut bacteria, including certain Bifidobacterium and Lactobacillus species (15, 16).

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.
3. May Have Cancer-Fighting Properties
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).

Similarly, mice fed diets rich in purple sweet potatoes showed lower rates of early-stage colon cancer — suggesting that the anthocyanins in the potatoes may have a protective effect (3, 22).

Extracts of orange sweet potatoes and sweet potato peels have also been found to have anti-cancer properties in test-tube studies (23, 24).

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.
4. Support Healthy Vision
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).

Beta-carotene is converted to vitamin A in your body and used to form light-detecting receptors inside your eyes (25, 26).

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.

Test-tube studies have found that the anthocyanins they provide can protect eye cells from damage, which may be significant to overall eye health (28).

SUMMARY
Sweet potatoes are rich in beta-carotene and anthocyanins, antioxidants that may help prevent vision loss and improve eye health.
5. May Enhance Brain Function
Consuming purple sweet potatoes may improve brain function.

Animal studies have found that the anthocyanins in purple sweet potatoes can protect the brain by reducing inflammation and preventing free radical damage (29, 30, 31).

Supplementing with anthocyanin-rich sweet potato extract has been shown to improve learning and memory in mice, possibly due to its antioxidant properties (32, 33).

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.
6. May Support Your Immune System
Orange-fleshed sweet potatoes are one of the richest natural sources of beta-carotene, a plant-based compound that is converted to vitamin A in your body (36).

Vitamin A is critical to a healthy immune system, and low blood levels have been linked to reduced immunity (37, 38).

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.
How to Add Them to Your Diet
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:

Sweet potato chips: Peeled, thinly sliced, and baked or fried.
Sweet potato fries: Peeled, cut into wedges or matchsticks, and baked or fried.
Sweet potato toast: Cut into thin slices, toasted, and topped with ingredients like nut butter or avocado.
Mashed sweet potatoes: Peeled, boiled, and mashed with milk and seasoning.
Baked sweet potatoes: Baked whole in the oven until fork-tender.
Sweet potato hash: Peeled, diced, and cooked with onion in a pan.
Spiralized sweet potatoes: Cut into spirals, sautéed, and sauced.
In baked goods: Sweet potato puree adds moisture without fat.
Preparing sweet potatoes with a little fat — such as coconut oil, olive oil, or avocado — can help boost the absorption of beta-carotene since it’s a fat-soluble nutrient (41, 42).

Although cooking sweet potatoes slightly reduces their beta-carotene content, they still retain at least 70% of this nutrient and are considered an excellent source (43, 44).

SUMMARY
Sweet potatoes are a versatile root vegetable that can be prepared in many ways.
The Bottom Line
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.
   
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