Blue Cohosh (Caulophyllum thalictroides) vs Wild Yam (Dioscorea villosa)

Blue Cohosh (Caulophyllum thalictroides)

Wild Yam (Dioscorea villosa)

About

Blue cohosh is an upright perennial herb reaching 3 feet in height, with large three-lobed leaves, yellow to purple flowers, and striking blue berries. It grows wild in much of eastern North America from Manitoba to Alabama, preferring woodland valleys and damp, north-facing slopes. The name 'cohosh' comes from the Algonquin language, and the plant was a popular remedy among many Native American tribes.

Wild yam (Dioscorea villosa) is a twining vine growing to about 20 ft (6 m), with heart-shaped leaves and small greenish-yellow flowers. It has traditionally been used for its antispasmodic and anti-inflammatory properties for menopausal symptoms, digestive complaints, muscle spasm, and joint pain; MSK says studies in humans are quite limited and more research is needed.

Safety & precautions

Use only under professional supervision. Do not take during pregnancy or while trying to conceive, as it stimulates uterine contractions and could induce miscarriage. Avoid during heavy menstrual bleeding. NCCIH says the use of blue cohosh to induce labor has been associated with life-threatening complications in the infant, including seizures, and that blue cohosh may cause high blood pressure, high blood sugar and chest pain. The plant can be toxic and can cause contact dermatitis. Not recommended while breastfeeding.

Overdose: May cause nausea, vomiting, diarrhea. Contrary to Myth: It is not a natural source of progesterone in the human body; the hormone-like compounds do not convert to progesterone internally. General Use: Consult a professional for long-term or high-dose use.

Safety text above is printed in full and is never abbreviated. For each plant’s complete precautions, drug and food interactions and preparation notes, open its own page - both are free.