Herb to Know: Wild Yam

Discover the uses of this versatile herb.

| February/March 2007

  • Wild yam is useful during pregnancy, though it also was used in the first prescription contraception.
    Photo by Janet Novak

Wild yam (Dioscorea villosa) is a versatile herb that might not win any beauty contests. Its rootstocks grow crooked and bear horizontal branches of long, creeping runners with thin reddish-brown stems that grow to a length of over 30 feet. 

The plant has winged seed pods and clusters of small, drooping yellow-green flowers that bloom from June to August. The heart-shaped leaves are long and broad with furrowed veins, which run lengthwise from the center top of the heart shape and fan outward. The leaves are usually alternate, but sometimes grow in twos and fours near the base of the plant. The upper surface of the leaf is smooth while the underside is downy. 

In medical usage, the herb is best known for chemical components used in the first prescription contraceptive pills. Wild yam root contains diosgenin, which can be converted to synthetic progesterone.

Despite its contraceptive uses, wild yam also is used during pregnancy. Because the herb nourishes the female endocrine system, herbalists believe wild yam can help prevent miscarriage and is one of the best herbs to relieve general pain during pregnancy. Early settlers used the small tubers, as they fell away from the vine, to ease labor pains, colic and leg cramps and to prevent morning sickness and miscarriage.



Wild yam is the basis for many herbal and pharmaceutical remedies and was used widely throughout history in many cultures. The pharmaceutical industry has used yam root as a basis for steroids and cortisone, anti-inflammatory drugs to reduce the swelling caused by rheumatism and hydrocortisone cream to treat eczema. The 16th-century herbalist John Gerard believed it outranked other wild herbs because of its value as a treatment for colic and liver ailments.   

Wild yam, which should not be confused with a sweet potato, has been used medicinally in China, Japan and throughout Southeast Asia for at least 2,000 years. It forms part of “The Pill of Eight Ingredients” traditionally prescribed in Chinese medicine to treat hypothyroidism and diabetes. Herbalists also prescribe the herb for exhaustion, lack of appetite, chronic thirst, chronic coughs and wheezing. The herb was popular with the ancient Aztec and Mayan people primarily as a source of food and for pain relief. Colonial doctors learned about this herb from Native Americans and used it as a treatment for rabies, epilepsy and nervous ailments.

brownie
6/20/2018 8:04:37 PM

does it grow in western nc i think it does but am i right




Subscribe Today - Pay Now & Save 64% Off the Cover Price

Get the latest on Natural Health and Sustainable Living with Mother Earth News!

Mother Earth News

Your friends at Mother Earth Living are committed to natural health and sustainable living. Unfortunately, the financial impact of COVID-19 has challenged us to find a more economical way to achieve this mission. We welcome you to our sister publication Mother Earth News. What you sought in the pages of Mother Earth Living can be found in Mother Earth News. For over 50 years, “The Original Guide to Living Wisely” has focused on organic gardening, herbal medicine, real food recipes, and sustainability. We look forward to going on this new journey with you and providing solutions for better health and self-sufficiency.

The impact of this crisis has no doubt affected every aspect of our daily lives. We will strive to be a useful and inspiring resource during this critical time and for years to come.

Best wishes,
Your friends at Mother Earth Living and Mother Earth News

Save Money & a Few Trees!

By paying with a credit card, you save an additional $5 and get 6 issues of Mother Earth News for only $12.95 (USA only).

You may also use the Bill Me option and pay $17.95 for 6 issues.

Canadian Subscribers - Click Here
International Subscribers - Click Here
Canadian subscriptions: 1 year (includes postage & GST).


Facebook Pinterest Instagram YouTube Twitter

Classifieds