7 Benefits of Purple Yam (Ube), and How It Differs from Taro (2024)

Purple yams, or ube, are nutritious, versatile, and starchy root vegetables. They are loaded with antioxidants that may help reduce blood pressure and blood sugar levels.

Dioscorea alata is a species of yam commonly referred to as purple yam, ube, violet yam, or water yam.

This tuberous root vegetable originates from Southeast Asia and is often confused with taro root. An indigenous staple of the Philippines, it’s now cultivated and enjoyed worldwide.

Purple yams have greyish-brown skins and purple flesh, and their texture becomes soft like a potato when cooked.

They have a sweet, nutty flavor and are used in a variety of dishes ranging from sweet to savory.

What’s more, they are loaded with vitamins, minerals, and antioxidants, all of which may benefit your health.

Here are 7 surprising health benefits of purple yam.

7 Benefits of Purple Yam (Ube), and How It Differs from Taro (1)Share on Pinterest

1. Highly nutritious

The purple yam (ube) is a starchy root vegetable that’s a great source of carbs, potassium, and vitamin C.

One cup (100 grams) of cooked ube provides the following (1):

  • Calories: 140
  • Carbs: 27 grams
  • Protein: 1 gram
  • Fat: 0.1 grams
  • Fiber: 4 grams
  • Sodium: 0.83% of the
    Daily Value (DV)
  • Potassium: 13.5% of the DV
  • Calcium: 2% of the DV
  • Iron: 4% of the DV
  • Vitamin C: 40% of the DV
  • Vitamin A: 4% of the DV

In addition, they are rich in powerful plant compounds and antioxidants, including anthocyanins, which give them their vibrant hue.

Studies have shown that anthocyanins may help reduce blood pressure and inflammation and protect against cancer and type 2 diabetes (2, 3, 4)

What’s more, purple yams are rich in vitamin C, which helps keep your cells healthy, boosts iron absorption, and protects your DNA from damage (5).

Summary Purple yams are starchy
root vegetables that are rich in carbs, potassium, vitamin C, and
phytonutrients, all of which are important for maintaining good health.

2. Rich in antioxidants

Purple yams are rich in antioxidants, including anthocyanins and vitamin C.

Antioxidants help protect your cells from damage caused by harmful molecules called free radicals (6).

Free radical damage is linked to many chronic conditions, such as cancer, heart disease, diabetes, and neurodegenerative disorders (7).

Purple yams are a great source of vitamin C, which acts as a potent antioxidant in your body.

In fact, studies have shown that consuming more vitamin C can increase your antioxidant levels by up to 35%, protecting against oxidative cell damage (8, 9, 10).

The anthocyanins in purple yams are also a type of polyphenol antioxidant.

Regularly eating polyphenol-rich fruits and vegetables has been linked to lower risks of several types of cancers (11, 12, 13).

Promising research suggests that two anthocyanins in purple yams — cyanidin and peonidin — may reduce the growth of certain types of cancers, including:

  • Colon cancer. One study showed
    up to a 45% reduction in tumors in animals treated with dietary cyanidin,
    while another test-tube study found that it slowed the growth of human
    cancer cells (14, 15).
  • Lung cancer. A test-tube
    study observed that peonidin slowed the growth of lung cancer cells (16).
  • Prostate cancer.
    test-tube study noted that cyanidin reduced the number of human prostate
    cancer cells (17).

That said, these studies used concentrated amounts of cyanidin and peonidin. Thus, it’s unlikely that you would reap the same benefits from eating whole purple yams.

Summary Purple
yams are a great source of anthocyanins and vitamin C, both of which are
powerful antioxidants. They have been shown to protect against cell damage and

3. May help manage blood sugar

The flavonoids in purple yams have been shown to help lower blood sugar in those with type 2 diabetes.

Obesity and inflammation caused by oxidative stress increase your risk of insulin resistance, poor blood sugar control, and type 2 diabetes (18).

Insulin resistance is when your cells don’t respond properly to the hormone insulin, which is responsible for maintaining your blood sugar control.

One test-tube study observed that flavonoid-rich purple yam extracts reduced oxidative stress and insulin resistance by protecting insulin-producing cells in the pancreas (19).

In addition, a study in 20 rats found that administering them higher amounts of purple yam extract lowered appetite, encouraged weight loss, and improved blood sugar control (20).

Finally, another study reported that a purple yam supplement reduced the rate of blood sugar absorption in rats with elevated levels, resulting in improved blood sugar control (21).

This is likely due in part to purple yams’ low glycemic index (GI). The GI, which ranges from 0–100, is a measure of how fast sugars are absorbed into your bloodstream.

Purple yams have a GI of 24, meaning that carbs are broken down into sugars slowly, resulting in a steady release of energy instead of a blood sugar spike (22).

Summary The flavonoids in purple yams may help promote
blood sugar control in people with type 2 diabetes. Also, purple yams have a
low glycemic index, which can help prevent blood sugar spikes.

4. May help lower blood pressure

High blood pressure is a major risk factor for heart attacks and strokes (23, 24).

Purple yams may have blood-pressure-lowering effects. Researchers believe this is likely due to their impressive antioxidant content (25).

A test-tube study found that purple yams contain antioxidants that may help lower blood pressure in a way similar to that of common blood-pressure-lowering medications called angiotensin-converting-enzyme inhibitors (ACE inhibitors) (26).

Another test-tube study showed that the antioxidants in purple yams could prevent the conversion of angiotensin 1 to angiotensin 2, a compound responsible for elevated blood pressure (26).

While these results are promising, they were obtained in a lab. More human research is needed before concluding whether eating purple yams can lower your blood pressure.

Summary Lab research has
demonstrated the impressive blood-pressure-lowering effects of antioxidant-rich
purple yam extracts. Still, more human studies are needed.

5. May improve symptoms of asthma

Asthma is a chronic inflammatory disease of the airways.

Research suggests that a high dietary intake of antioxidants like vitamins A and C are associated with a reduced risk of asthma (27, 28).

One review of 40 studies found that the occurrence of asthma in adults was associated with low vitamin A intake. In fact, those with asthma were only meeting about 50% of the daily recommended intake of vitamin A, on average (29).

In addition, the incidence of asthma increased by 12% in those who had low dietary vitamin C intake.

Purple yams are a good source of antioxidants and vitamins A and C, helping you reach your daily intake levels for these vitamins.

Summary Antioxidants like vitamins A and C in purple
yams may help reduce the risk and symptoms of asthma.

6. Promotes gut health

Purple yams may help improve your gut health.

They are full of complex carbs and a good source of resistant starch, a type of carb that is resistant to digestion.

One test-tube study showed that resistant starch from purple yams increased the number of Bifidobacteria, a type of beneficial gut bacteria, in a simulated large bowel environment (30).

These bacteria play a vital role in your gut health, aiding the breakdown of complex carbs and fiber (31).

They may even help reduce your risk of certain conditions, such as colorectal cancer, inflammatory bowel disease (IBD), and irritable bowel syndrome (IBS). They also produce healthy fatty acids and B vitamins (32, 33, 34, 35).

Furthermore, one study in mice found that purple yams had anti-inflammatory effects and decreased symptoms of colitis (36).

However, more research is needed to know if eating whole purple yams has anti-inflammatory effects in humans with colitis.

Summary The resistant starch in
yams helps increase the growth of Bifidobacteria, which are healthy
bacteria that play a vital role in maintaining your gut health.

7. Very versatile

Purple yams have a wide range of culinary uses.

These versatile tubers can be boiled, mashed, fried, or baked. They are often used in a variety of dishes in place of other starchy vegetables, including:

  • stews
  • soups
  • stir-fries

In the Philippines, purple yams are made into a flour which is used in many desserts.

Furthermore, ube can be processed into a powder that can be used to make vibrantly colored foods, including rice, candy, cakes, desserts, and jams.

Summary Purple yams can be
converted into various forms, making them one of the most versatile vegetables
in the world.

Purple yam vs. taro root

Taro root (Colocasia esculenta) is a root vegetable native to Southeast Asia.

Often called the potato of the tropics, it varies in color from white to grey to lavender and has a mildly sweet taste.

Purple yams and taro root look similar, hence the confusion between the two. Nonetheless, when stripped of their skins, they are different colors.

Taro is grown from the tropical taro plant and is not one of the nearly 600 types of yams.

Summary Taro root grows from the
taro plant, and unlike purple yams, they are not a species of yam.

The bottom line

Purple yams are an incredibly nutritious starchy root vegetable.

Their powerful antioxidants may help reduce your blood pressure and blood sugar levels.

They are tasty and versatile with a vibrant color, making them an exciting ingredient that can be used in a variety of sweet and savory dishes.

7 Benefits of Purple Yam (Ube), and How It Differs from Taro (2024)


What is the difference between ube taro and purple yam? ›

Purple yams and taro root look similar, hence the confusion between the two. Nonetheless, when stripped of their skins, they are different colors. Taro is grown from the tropical taro plant and is not one of the nearly 600 types of yams. taro plant, and unlike purple yams, they are not a species of yam.

What are the benefits of purple yams? ›

Purple yam is a great source of potassium, carbohydrates, and vitamin C. Additionally, it provides iron and vitamin A and has very little fat content. They contain potent plant chemicals, such as anthocyanins, which reduce blood pressure and inflammation.

What's the difference between ube and yams? ›

Scientifically named Dioscorea alata, the ube is a true yam — as opposed to some varieties of sweet potatoes which have been colloquially dubbed yams — with a tough, bark-like skin, irregular shape, and flesh that ranges from extremely light lavender to vibrant purple.

What is the taste difference between taro and purple yam? ›

Taste: Both are subtly sweet with nutty, vanilla undertones. Ube is sweeter than taro. Culinary uses: Ube is usually used in desserts. Taro is used in both desserts and savory dishes.

What is the difference between ube and taro dessert? ›

Generally, ube is sweeter than taro. It contains much more natural sugar, and its softer texture makes it taste sweeter in your mouth. However, both ube and taro usually have plenty of sugar added to them when used in desserts.

Why do people confuse taro and ube? ›

Taro (also known as Colocasia esculenta) is a root crop that originated in Southeast Asia. It is often confused with ube, which is another root vegetable. One prime reason for this is because they both don bark-like skin. However, taro is not in the same family as yams and sweet potatoes.

What does ube do to the body? ›

Ube is a good source of dietary fiber, which plays a vital role in promoting gut health. Fiber helps keep you feeling full and satisfied, aids in digestion, and may even help regulate blood sugar levels.

Is purple yam good for your liver? ›

According to a Japanese study, purple sweet potato – rich in the red pigment anthocyanin – may keep your liver healthy. Anthocyanins contribute to the colour of blueberries, cranberries, eggplant, grapes and red cabbage, and are believed to have antioxidant and anti-inflammatory effects.

Which color sweet potato is healthiest? ›

Sweet Potatoes and Health

Sweet potatoes with orange flesh are richest in beta-carotene. Sweet potatoes with purple flesh are richer in anthocyanins. Beta-carotene and anthocyanins are naturally occurring plant “phyto” chemicals that give vegetables their bright colors.

Can you eat ube raw? ›

Keep in mind that ube root contains some toxins in it and should never be consumed raw.

Why is purple yam called ube? ›

Ube is a major vegetable crop in the Philippines. The word ube (pronounced "ooo-bay") comes from the yam's name in Tagalog, the national language of the Philippines. (In the Philippines, it is also called ubi; when sold in seed catalogs in the United States for growing at home it is sometimes called "winged yam").

Can you eat the skin of ube? ›

Ube has a thick, bark-like skin, which allows the crop to store for longer, but is unpleasant to eat.

How are taro and ube different? ›

While they both have a similar taste and are often used in sweet dishes, they differ in texture and nutritional value. Taro is earthy and starchy, and is a great choice for savory dishes, while ube has a distinct and sweet flavor, making it perfect for desserts.

Which is healthier, purple yam or sweet potato? ›

Sweet potatoes tend to have slightly fewer calories per serving than yams. They also contain a bit more vitamin C and more than triple the amount of beta-carotene, which converts to vitamin A in the body.

Why is taro illegal in Australia? ›

"Taro (Colocasia esculenta) is regarded as an environmental weed in Queensland, New South Wales and south-western Western Australia. This species is of particular concern in south-eastern Queensland and was recently ranked among the 200 most invasive plants in the region.

Is Vietnamese purple yam the same as ube? ›

Ube, also known as purple yam, is a tuberous root vegetable that hails from Southeast Asia. Ube is known for its unique flavor profile, which can be described as a combination of vanilla, pistachio, and coconut.

Can I use purple sweet potato instead of ube? ›

Even with their differences, substituting purple sweet potatoes for ube works great in a pinch. Only a true connoisseur will taste the subtle difference.

Is ube only in the Philippines? ›

The center of origin of purple yam is in the Philippines, but archaeological evidence suggests that it was exploited in Island Southeast Asia and New Guinea before the Austronesian expansion.

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