Purple yam facts and health benefits

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Purple yam facts and health benefits

Purple yam Quick Facts
Name: Purple yam
Scientific Name: Dioscorea alata
Origin Native to Southeast Asia
Colors Bright lavender in color, occasionally white.
Shapes Rough textured, variously shaped from roughly oblong to curvaceously twist depending on specific varieties.
Flesh colors White, yellow or purple, depending on variety
Taste Mild sweet taste
Calories 118 Kcal./cup
Major nutrients Vitamin B6 (22.31%)
Carbohydrate (21.45%)
Copper (20.00%)
Vitamin C (19.00%)
Potassium (17.36%)
Health benefits Better blood circulation, Make the digestion so smoothly, Good source of carbohydrates,Anti-bacteria, Overcoming Asthma, Low calorie, Add the weights of the body, Anti-Cancer
Dioscorea alata commonly known as purple yam is actually a species of yam, a tuberous root vegetable. Purple yams are similar to sweet potatoes and are known by several names, including purple yam, greater yam, winged yam, water yam, white yam, purple or white yam, guyana arrowroot, ten-month yam. However exact place of origin is unknown it is believed that common yam comes from the islands of Indonesia. The tubers are usually bright lavender in color, hence the common name, but they may sometimes be white. It is sometimes confused with taro and the Okinawa sweet potato (Ipomoea batatas cv. Ayamurasaki), although D. alata is also grown in Okinawa where it is known as beniimo. With its origins in the Asian tropics, D. alata has been known to humans since ancient times.

Plant

Purple Yam is a fast-growing, twining, tuberous-rooted, herbaceous perennial vine and is normally about 20-25 meter tall with supporting tree. It is found growing widely in the tropical and sub-tropical regions of the world and is found growing in a fertile well-drained soil. The plant has tumorous root called yam, often with small axillary tubers as is used as vegetable. Stems are purplish in color and square shaped and slippery while green on the stem or leaf. Leaves are large, bright green and tapered at the end up to 25cm. long, heart-shaped. The veins are marked. Flowers are arranged in clusters, and bloom at irregular times.

Fruit

Purple Yam is an earthly, healthy and delicious food. Purple yam is a tuber with rough textured, dark colored grayish brown skins and purple flesh. Flesh color may differ from white, yellow or purple, depending on variety. Tubers are normally rough textured, variously shaped from roughly oblong to curvaceously twist depending on specific varieties. Purple yam is very twisted looking in appearance and grows on a vine rather than underground. They have mild sweet taste.

Purple and blue foods are an excellent source of nutrients. These foods derive their shade from the antioxidant Anthocyanin. It is a very energy defense towards cell damage and attacks on your immune system. They are nutritionally similar to other types of potatoes; they are rich in carbohydrates but low in protein and fat. In the Philippines, it is a major vegetable crop and an important source of food. It is abundant in the last months of the year. And this is why during the Christmas holidays, a lot of desserts and snacks in the Philippines are made of purple yam. It is used in a variety of desserts, as well as a flavor for ice cream, milk, Swiss rolls, tarts, cookies, cakes, and other pastries.

History

At the moment, there are over 600 species of yam (Dioscorea spp.) Making it difficult to determine its origin. It is supposed that common yam comes from the islands of Indonesia. Historically, it spread from Asia to the African continent, where it was exported to America through the slave trade. At present, the world’s leading producer in West Africa, followed by Southeast Asia, Pacific Islands and Caribbean region.

Nutritional value

Apart from their mild sweet taste, purple yam is a good source of nutrients, vitamins and minerals. Consuming 100 gram of purple yam offers 0.29 mg of Vitamin B6, 27.89 g of Carbohydrate, 0.18 mg of Copper, 17.1 mg of Vitamin C, 816 mg of Potassium, 4.1 g of Total dietary Fiber, 0.11 mg of Vitamin B1, 55 mg of Phosphorus, 0.54 mg of Iron, 0.31 mg of Vitamin B5, 23 µg of Vitamin B9, 21 mg of Magnesium, 0.55 mg of Vitamin B3, 1.53 g of Protein, 0.03 mg of Vitamin B2 and 0.24 mg of Zinc.

Health benefits of Purple Yam

Purple Yam is very delicious especially eaten in a condition that is still warm. Most people still assume when Purple Yam is a food village. Currently, Purple Yam not only can be processed into traditional meals. But it is also made into a more modern fare like a pudding of sweet violet, purple yams, rice and purple Yam brownies. Listed below are some of the popular health benefits of Purple yam

1. Proper blood circulation

Purple pigments contained in the purple Yam are related in conducting the blood circulation in the body. Purple pigments that give color to the meat of the purple Yam is called anthocyanin. As discussed previously, the relationships serve as antioxidants that can absorb air pollution. So any blood clots will not occur and the blood circulation in our body become smooth.

2. Better digestion

Fiber and pectin found in purple yam is quite beneficial for proper digestion of the food. Both were helpful in keeping the digestive process in the funnel and digest remain good. So we will be safe from numerous digestive disorders such as hemorrhoids, constipation, and even cancer.

3. Good source of carbohydrates

Purple yam contains a high amount of carbohydrate due to which we can easily replace rice. Beautiful purple color can be used as ingredients for the food coloring.

4. Anti-bacteria

Anti-bacterial activity of purple Yam reach 3.2 times higher than various kinds of blueberries. So including purple yam in your regular diet is quite beneficial for overcoming all the bacterial problems.

5. Overcoming Asthma

Asthma is not a disease it can be cured, it often decline with routinely consuming purple Yam. Asthma occurs due to pulmonary organs that are difficult to expand. By consuming purple yam on a regular basis, asthma will be cured and does not recurred.

6. Low calorie

Purple Yam or yellow sweet potato has 112 calories without the fat and cholesterol content of sodium. Normally purple Yam is consumed by boiling or steaming which increases its sweet taste but the calories remain low.

7. Add the weights of the body

Purple Yam consists of complex carbohydrates and also has the sweet taste which can help to add weight to your body. Certainly not just consume the purple yam regularly but also comes with exercise and sports. Then the muscles can be formed and your weight will increase effortlessly.

8. Anti-Cancer

Purple yam has 2.5 times higher antioxidant activity compared to different types of blueberries. Because of its higher antioxidant activity it can help to control the cancer cells in the body. Additionally, selenium and iodine content in the purple yam is 20 times higher than other types of ubi. Thus it is quite helpful for overcoming cancer.

9. Processed into a variety of healthy dishes

Apart from boiled Yam and fries, beautiful purple color of purple yam can be used as a natural dye. A wide variety of healthy foods can be made from sweet violet color. We can find numerous recipes where purple yam can be used.  Purple Yam can be quite delicious and healthy addition in your food.

How to Eat

  • Purple yam is used in a variety of desserts, as well as a flavor for ice cream, milk, Swiss rolls, tarts, cookies, cakes, and other pastries.
  • In the Philippines, it is known as ube and is often eaten boiled or as a sweetened jam called ube halayá; the latter is a popular ingredient in the iced dessert called halo-halo.
  • Serves as an essential element while cooking the famous Guajarati mixed vegetable dish-Undhiyu.
  • Purple yam flour is a widely used food material and is utilized in preparing dehydrated food products.
  • Purple yam papad is an essential food supplement in the Indian dietary context.
  • Stir-fried chips are eaten during religious fasting in Maharashtra.
  • Purple yam is an essential ingredient in Undhiyu.
  • Purple yam is a popular dessert in Jaffna, Sri Lanka.
  • Ube is now making a scene in the American foodie trend. It is now being used to make ube truffles, ube leche flan cupcakes and ube donuts.
  • Tubers may also be pounded to produce flour or starch

Traditional benefits and uses of Purple yam

  • Presence of high level of Vitamin B6 in Purple yam reduces depression among women.
  • The pace of converting the carbohydrates present in Purple yam into sugar is very sluggish, hence, helps to curb the increase of blood sugar level in the human body.
  • Purple yam elements prove beneficial for human urinary, respiratory and nervous systems.
  • High manganese content in Purple yam increases the energy level in human body.
  • Purple yam has been used as a vermifuge and laxative in various healing practices.
  • It is widely known for curing burned hemorrhoids, fever, gonorrhea, tumors, leprosy and many more.
  • Solves a number of digestive problems.
  • Controls high blood pressure impacts.
  • Provides relief in muscle tension, nerve tension, neuralgia and cramps.
  • Powdered tubers used as a remedy for piles, gonorrhea, and applied externally to sores.
  • Tuber paste applied on cancerous wounds; used for leprosy, gonorrhea, skin diseases and high blood pressure in Assam
  • Used to treat diarrhea, frequent urination, cough, diabetes mellitus, burns and scalds.
  • It is used to treat diarrhea, fortify the spleen and kidneys in Traditional Chinese medicine.
  • It is used to relieve dysmenorrhea.
  • Tuber contains allantoin, a cell-proliferant that speeds the healing process.
  • Tuber is used internally in the treatment of tiredness, weight loss, poor appetite, poor digestion, chronic diarrhea, asthma, dry coughs, frequent or uncontrollable urination, diabetes and emotional instability.
  • It is applied externally to ulcers, boils and abscesses.

Other Facts

  • Purple Yam is used as an ornamental plant for its beautiful leaves.

Uses of purple yam

Edible food

Purple yam is mostly used in food as an important source of carbohydrates. Purple yam is mainly consumed in Asia and the U.S., while other species like D. rotundifolia and D. bulbifera are typical of Africa. However, in some areas where it is common, this tuber has been displaced the sweet potato (Ipomoea batatas) and cassava (Manihot sculenta), plants with lower cost of cultivation.

Fodder

Extra tubers can be used to produce animal feed, though its use is rare due to the high cost of cultivation. The skins resulting from production processes such as yam flour or other products are used for the manufacture of feed for cattle.

Production of fructose

Recently, yam is being researched for manufacturing fructose sweeteners. This is due to the rising price of corn and sugar cane produced by demand for ethanol fuels made from them. Yam provides good taste and for the production of fructose.

Production of pharmaceuticals

Only wild yam (D. villosa) and two cultivated species (D. Composite and D. floribunda) are rich in steroid saponins, which through laboratory processes are converted into raw material for manufacturing oral contraceptives, hormone and cortisone. The winged yam is not used for such purposes as its medicinal content is lower.

Production of bio plastics

From yam starch polylactic acid is obtained, which is used to make biodegradable plastics and suture material.

How to Select

Purple yams are sold fresh in supermarkets or wet markets. Select that are firm and do not have any cracks, bruises or soft spots. Avoid those that are shown in the refrigerated section of the produce department since cold temperature negatively alters their taste.

Culinary Uses

  • Purple yam is used to make ube powder, which is a starchy substance added as an ingredient to sweet baked goods, cakes, ice cream, jams, and curries.
  • All varieties of the purple yam are used to make both sweet and savory dishes as well as ground starchy substances used as flavorings and ingredients for other foods.

How to Store

Purple Yams should be stored in a cool, dark and well-ventilated place where they will keep fresh for up to ten days. They should be stored loose and not kept in a plastic bag. Keep them out of exposure to sunlight since this will cause them to sprout or ferment. Uncooked purple yams should not be kept in the refrigerator.

Purple yam Facts

Purple yams are similar to sweet potatoes and are known by several names, including violet yams, ubes, and water yams. Purple yams, or Dioscorea alata, are nutritionally similar to other types of potatoes; they are rich in carbohydrates but low in protein and fat. Purple Yam is an earthly, healthy and delicious food. Purple yams are tubers with grayish brown skins and purple flesh. They taste sweet and a variety of a true yam, which is known as “ube” or “ubi” in the Philippines. It has rough textured, dark colored skin and a light purple colored flesh. Purple yam is very gnarled looking in appearance and grows on a vine rather than underground. It has swollen roots or tubers corms, which are formed from the vines, leaves, roots and stolons of the plant. It is abundant in the last months of the year. And this is why during the Christmas holidays, a lot of desserts and snacks in the Philippines are made of ube.

Name Purple yam
Scientific Name Dioscorea alata
Native Native to Southeast Asia (Indochina, Philippines, Indonesia, etc.) and surrounding areas (Taiwan, Ryukyu Islands, Assam, Nepal, New Guinea, Christmas Island).
Common Names Purple yam, greater yam, winged yam, water yam, white yam, purple or white yam, guyana arrowroot, ten-month yam.
Name in Other Languages Assamese: Kath alu.
Bengali: Bengo nari, Chupri alu, Kham alu
Burmese: Myauk uu ni, Taw myauk uu
Chinese: Mao shu, Shen shu, Da shu.
Fijian: Uvi
French: Igname ailée, Grande igname, Igname franche, Igname blanche.
German: Geflügelter Yam, Wasseryam.
Hawaiian: Uhi
Hindi: Chupri alu, Khamalu
Indonesian: Uwi, Huwi
Japanese: Beniimo, Daijo, Daiyo
Korean: 알라타마
Laotian: Houo
Nepalese: Ghara tarul, Kukur tarul
Oriya:  Kambo alu.
Portuguese: Inhame da India
Russian: Dioskoreia alata, Dioscoreia krylataia, Iams belyi, Iams krylatyi
Spanish: Ñame comun, Ñame grande, Ñame alado, Ñame de agua, Ñame asiatico, Tabena
Vietnamese: Khoai mo, Cam kenh, Co sa, Cu cai, Cu canh, Khoai trut, Khoai vac, Man ham
India: Ratalu or violet yam
Tamil: Rasa valli kilangu (இராசவள்ளிக்கிழங்கு)
Telugu: Peruvalli, Perumvalii kilangu,  Mullu valli, Yams kallu.
Kannada: Thuppa genasu (ತುಪ್ಪ ಗೆಣಸು)
Tulu: Thoona or soona kerungu (ತೂ/ಸೂಣ ಕೆರುಂಗು)
Marathi: Kondfal (कोंदफळ)
Malayalam: Kachil (കാച്ചില്)
Vietnam: Khoai mỡ
Southern Nigeria: Ji, ji abana
Southwestern Nigeria: Isu ewura
Spain: Ñame común, ñame grande, ñame asiático, ñame de agua, ñame alado.
Swedish: Storjams 
Venezuela: Ñame de agua
Colombia y Perú: Tabena
Argentina: Batatilla
México: Iñame, ñame, ñangate
Costa Rica: Ñame blanco
Puerto Rico: Ñame de mina
Surinam: Napi
Brazil: Cará branco, cará cultivado, cará de Angola, inhame da India
Filipines: ubi, ube
Thai: Man, Man bak hep, Man liam, Man sao, Noi
Plant growth Habit Fast-growing, twining, tuberous-rooted, herbaceous perennial vine
Growing Climate Cultivated extensively in the tropical and sub-tropical regions of the world.
Soil Grows well in a fertile well-drained soil
Plant Size 30 feet in length
Root Grows well in a fertile well-drained soil
Stem Herbaceous, purplish in color and square shaped and slippery while green on the stem or leaf.
Leaf Large, up to 25cm. long, heart-shaped and bright green. The veins are marked.
Flower Monoecious yellow-white flowers are arranged in clusters, and bloom at irregular times
Tuber Shape & Size Rough textured, variously shaped from roughly oblong to curvaceously twist depending on specific varieties.
Tuber Color Bright lavender in color, occasionally white.
Tuber Skin Rough, grayish brown skins
Tuber Weight About 100-150 pounds
Flesh Color White, yellow or purple, depending on variety,
Fruit Capsule, hard, bright, 2 – 3cm. in diameter.
Taste Mild sweet taste.
Health benefits
  • Better blood circulation
  • Make the digestion so smoothly
  • Good source of carbohydrates
  • Anti-bacteria
  • Overcoming Asthma
  • Low calorie
  • Add the weights of the body
  • Anti-Cancer
Major Nutrition Vitamin B6 (Pyridoxine) 0.29 mg (22.31%)
Carbohydrate 27.89 g (21.45%)
Copper, Cu 0.18 mg (20.00%)
Vitamin C (Ascorbic acid) 17.1 mg (19.00%)
Potassium, K 816 mg (17.36%)
Total dietary Fiber 4.1 g (10.79%)
Vitamin B1 (Thiamin) 0.11 mg (9.17%)
Phosphorus, P 55 mg (7.86%)
Iron, Fe 0.54 mg (6.75%)
Calories in 100 g 118 K cal
 

References:

https://en.wikipedia.org/wiki/Dioscorea_alata

http://www.botanical-online.com/english/yam_dioscorea_alata.htm

https://fitancozy.blogspot.com/2016/01/purple-sweet-potato-benefits-for-health.html

http://www.plantnames.unimelb.edu.au/Sorting/Dioscorea.html

https://npgsweb.ars-grin.gov/gringlobal/taxonomydetail.aspx?id=14175

http://eol.org/pages/1121207/overview

http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=279847&isprofile=0&

http://www.medicinalplantsindia.com/purple-yam.html

https://www.mskcc.org/cancer-care/integrative-medicine/herbs/wild-yam

http://www.pfaf.org/User/Plant.aspx?LatinName=Dioscorea+batatas

http://davesgarden.com/guides/pf/go/32242/

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