Osha Root / Bear Medicine
Ligusticum porteri
Osha Root — known as 'Bear Medicine' because bears seek it out after hibernation — is one of the most revered medicinal plants of the Rocky Mountain tribes and Pueblo peoples. Rich in phthalides (Z-ligustilide), ferulic acid, and volatile oils with potent antiviral and respiratory-healing properties. Increasingly studied for cancer-supportive care: supporting lung health during radiation therapy, reducing viral infection risk during chemotherapy-induced immunosuppression, and as an adaptogenic tonic for treatment fatigue. Particularly sacred to Navajo and Zuni healers.
Medicinal Properties
Cancer Types Studied
Recommended Dosage
Root tincture (1:5): 2–4 ml in water 3–4 times daily during illness. Root decoction: 1 tsp dried root simmered 15 minutes, drink 2–3 cups daily. Essential oil (steam inhalation only — not internal).
Preparations
Osha Root Tincture
2–4 ml in water or juice, 3 times daily. Traditionally used at onset of respiratory infection, for immune support during chemotherapy, and to clear lung congestion from radiation therapy.
Bear Root Tea (Decoction)
1 tsp dried Osha root simmered gently in 2 cups water for 15 minutes. Strain, add raw honey and fresh ginger. Drink 2–3 cups during respiratory illness or for lung support.
NIH / PubMed Research
Links open on PubMed (National Library of Medicine). Research is ongoing — results may not reflect clinical use.
Cautions & Interactions
- Avoid in pregnancy — uterine stimulant
- Avoid with blood thinners (ferulic acid)
- Harvest ethically — wild Osha is at risk of over-harvesting; prefer cultivated sources or Indigenous-harvested products
- Do not confuse with Poison Hemlock (Conium maculatum) — similar appearance, deadly
Related Herbs
Informational only. Not medical advice. Consult your healthcare provider before use.