Mountain yam is scientifically known as Dioscorea pentaphylla is a herbaceous, climbing, twining, perennial monocots plant which is native to southern and eastern Asia (China, India, Indochina, Indonesia, Philippines, etc.) as well as New Guinea and northern Australia.

 

Dioscorea pentaphylla is also known as Mountain Yam, Five Leaf Yam, Wild yam, Prickly yam is a member of the Dioscoreaceae family. It is native to southern and eastern Asia and grows well in lowland tropical areas. It is a prickly vine that twines counterclockwise around objects and other plants. It may reach 10 meters in length. The tubers of the vine can be cooked and eaten.

MOUNTAIN YAM FACTS

Plant

Mountain Yam is herbaceous, climbing, twining, perennial monocots vegetables sized 30 feet (10 m) tall which grow well in lowland tropical areas. Normally it prefers a deep, well-drained, sandy loam that is not liable to water-logging. The stem is 2–5 mm in diameter, twining to the left, annual, terete, towards base woody and densely prickly, prickles lax on upper stem. Leaves are alternate and compound with 3 to 5 leaflets. Leaflets measure 2 to 4 inches (5-10 cm) long and 0.8 to 1.5 inches (2-4 cm) wide. The plant produces bulbils that are horseshoe-shaped and about 1 cm in diameter. Male flowers occur in spikes up to 12 inches (30 cm) long at the branch ends whereas female flowers occur in spikes, but are shorter, 2 to 10 inches (5-25 cm) long. Flowering normally starts from August-October. Fruits are normally known as capsules that are black at maturity, long ellipsoid, and 2-2.5 cm, thinly leathery, sparsely hairy, wings 0.5–0.6 cm wide. Capsules consist of seeds that are 3–4.5 by 3.5–4 mm, lenticular-ovoid with a small apical projection; wing 7–11 by 3.5–5 mm, extending from seed base, oblong.

Tuber

The edible part of mountain yam is known as a tuber that is usually single, irregular to an elongated, egg-shaped portion of the plant. The tuber may weigh 3 pounds and may occur near the soil surface or more than 3 feet (1 m) underground. The tubers of the vine can be cooked and eaten. Tubers and bulbils are the edible parts, more commonly consumed in the north, commonly peeled and boiled or roasted.

History

Mountain Yam is native to southern and eastern Asia (China, India, Indochina, Indonesia, Philippines, etc.) as well as New Guinea and northern Australia. It is extensively grown as a food crop and naturalized in Cuba and on several island chains in the Pacific (including Hawaii).

Nutritional Value

Apart from their delightful tastes Mountain yam, cooked without salt is a good source of nutrients, vitamins, and minerals. Consuming 100 grams of cooked mountain Yam offers 0.209 mg of Vitamin B6, 20 g of Carbohydrate, 0.129 mg of Copper, 0.283 mg of Manganese, 495 mg of Potassium, and 0.48 mg of Vitamin B5. Moreover many Amino acids like 0.014 g of Tryptophan 0.061 g of Threonine 0.059 g of Isoleucine 0.109 g of Leucine and 0.067 g of Lysine are also found in 100 grams of cooked mountain yam.

Minerals	Amount	% DV
Calcium, Ca	8 mg	0.80%
Iron, Fe	0.43 mg	5.38%
Magnesium, Mg	10 mg	2.38%
Phosphorus, P	40 mg	5.71%
Potassium, K	495 mg	10.53%
Sodium, Na	12 mg	0.80%
Zinc, Zn	0.32 mg	2.91%
Copper, Cu	0.129 mg	14.33%
Manganese, Mn	0.283 mg	12.30%
Selenium, Se	0.9 µg	1.64%

Vitamins	Amount	% DV
Water-soluble Vitamins
Vitamin B1 (Thiamin)	0.086 mg	7.17%
Vitamin B2 (Riboflavin)	0.014 mg	1.08%
Vitamin B3 (Niacin)	0.13 mg	0.81%
Vitamin B5 (Pantothenic acid)	0.48 mg	9.60%
Vitamin B6 (Pyridoxine)	0.209 mg	16.08%
Vitamin B9 (Folate)	12 µg	3.00%
Folic Acid	0 µg	N/D
Folate, food	12 µg	N/D
Folate, DEF	12 µg	N/D

Lipids	Amount	% DV
Fatty acids, total saturated	0.018 g	N/D
Palmitic acid 16:00 (Hexadecanoic acid)	0.015 g	N/D
Stearic acid 18:00 (Octadecanoic acid)	0.001 g	N/D
Fatty acids, total monounsaturated	0.003 g	N/D
Oleic acid 18:1 (octadecenoic acid)	0.003 g	N/D
Fatty acids, total polyunsaturated	0.036 g	N/D
Linoleic acid 18:2 (octadecadienoic acid)	0.03 g	N/D
Linolenic acid 18:3 (Octadecatrienoic acid)	0.006 g	N/D

Amino Acids	Amount	% DV
Tryptophan	0.014 g	3.18%
Threonine	0.061 g	3.47%
Isoleucine	0.059 g	3.53%
Leucine	0.109 g	2.95%
Lysine	0.067 g	2.00%
Methionine	0.023 g	N/D
Cystine	0.021 g	N/D
Phenylalanine	0.08 g	N/D
Tyrosine	0.046 g	N/D
Valine	0.07 g	3.31%
Arginine	0.144 g	N/D
Histidine	0.038 g	3.08%
Alanine	0.071 g	N/D
Aspartic acid	0.175 g	N/D
Glutamic acid	0.205 g	N/D
Glycine	0.06 g	N/D
Proline	0.061 g	N/D
Serine	0.092 g	N/D

*Above mentioned Percent Daily Values (%DVs) are based on 2,000 calorie diet intake. Daily values (DVs) may be different depending upon your daily calorie needs. Mentioned values are recommended by the U.S. Department of Agriculture. They are not rxharun.com recommendations. Calculations are based on average age of 19 to 50 years and weigh 194 lbs. Source:

Health benefits of Mountain Yam

Mountain Yam is a good source of Vitamins, minerals, and nutrients that are essential to living healthy lives. It is extremely beneficial in treating high blood pressure, fights diabetes, lowers the risk of heart problems, helps maintain dental health, and many more so including mountain yam in your daily diet is essential to solve all these problems rapidly.

1. Helps Treat High Blood Pressure

Several types of research suggest that taking vitamin B6 supplements may be able to help lower blood pressure in people along with existing high blood pressure levels. Vitamin B6 present in mountain yam increases blood flow, lowers build-up in the arteries, and helps prevent common factors of heart disease. A cupful of mountain yam consists of 0.209 mg of vitamin B6 which is 16.08% of the recommended value.

2. Immunity

Copper found in mountain yam is a vital part of the healing process and ensures better wound healing. Copper acts as an extremely good immunity builder, and it also works as a cure for anemia, which will allow your body to both defend itself better and heal itself faster. Copper is a co-factor in numerous enzymatic processes that result in endothelial growth or the healing process of tissue.

3. Fights and Damages Diabetes

Manganese is essential to help with the proper production of digestive enzymes responsible for a process called gluconeogenesis. Gluconeogenesis includes the conversion of protein’s amino acids into sugar and the balance of sugar within the bloodstream. Though the exact mechanism still isn’t clear, manganese has been revealed to help prevent excessively high blood sugar levels that can contribute to diabetes.

4. Lower Risk of Heart Problems

Taking in an adequate quantity of potassium will put you at a lower risk of developing heart problems like stroke and heart disease. Mountain yam consists of 495 mg of potassium which is 10.53% of the daily recommended value. If you’ve already been identified with a heart problem, you’ve likely been told to watch your level of potassium.

Foods that are rich in potassium also consist of antioxidants as well as other minerals which will help your heart and result in greater overall healthiness. To complete your heart health profile be sure you’re receiving a sufficient quantity of exercise each day, such as a walk, strength training, or yoga.

5. Healthy Skin and hair

Mountain Yam consists of a considerable amount of Vitamin B5 which helps to keep skin healthy and attractive in appearance. It helps to delay the appearance of premature aging signs on the skin like wrinkles and age spots. Research has also revealed that Vitamin B5 plays an important role in the pigmentation of hair and prevents it from losing its color until you are well into your older years.

6. Improves brain function

It ensures the smooth functioning of the brain and helps improve memory and concentration. Vitamin B1 found in mountain yam helps relieve stress and also helps strengthen the nerves. The vitamin is used to reduce the progression of multiple sclerosis, Alzheimer’s disease, cirrhosis, and other infections.

7. Helps Maintain Dental Health

Mountain Yam is a good source of phosphorus which is extremely important for bone health, it’s also important for maintaining teeth and gum health. Phosphorus along with Calcium, vitamin D play an important role in the formation and maintenance of dental health simply by supporting tooth enamel, jaw-bone mineral density, and holding the teeth in place thus, these minerals and vitamins can also help heal tooth decay.

Especially Children need foods high in phosphorus as well as calcium-rich foods while they are developing adult teeth in order to form teeth’ hard structure. Vitamin D is required along with phosphorus to regulate the body’s balance of calcium and improve its absorption during tooth formation. Vitamin D can also help to decrease inflammation of gums that is associated with periodontal gum disease.

8. Iron Deficiency Anemia

Cooked Mountain yam consists of 0.43 mg of iron which is 5.38% of the daily recommended value.  Iron is helpful in the treatment of a severe disorder called iron deficiency anemia that results from a lack of iron in the human body. This is where most of these health benefits come from, as a result of preventing this terrible disease that affects millions of people around the world. It is one of the most common nutritional deficiencies on the earth.

9. Help Improve Muscle Mass

Consumption of protein is essential to build and maintain healthy muscle mass, while also supporting tendon, ligaments as well as other body tissue. When your diet is lacking amino acids, “muscle wasting” (or muscle atrophy) can take place when your muscle fibers are broken down to support your body’s energy needs.

Protein is particularly essential after exercise since physical activity like strength training purposefully damages muscle tissues thus they can repair and grow back stronger. For the process to happen effectively, you need some extra protein to help repair the damage. While protein alone won’t enhance athletic performance, research shows that consuming protein before and after exercise will help increase muscle recovery, promotes muscle synthesis, and serve as an effective muscle ache treatment.

How to Eat

• Tubers and bulbils are edible, more commonly eaten in the north, usually peeled and boiled or roasted.

Other Traditional benefits and uses of Mountain Yam

• Juice of the plant is applied to boils.
• A decoction of the plant is applied to swellings.
• A paste of the leaves made with mustard oil is rubbed into affected areas for the treatment of rheumatism.
• Tubers are tonic; used in swelling, rheumatism, and as a hair wash for killing lice.

References

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