OSHA

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Sigstedt focused on Ligusticum porteri, a vanilla-celery-scented herb growing in the Rocky Mountains and the Southwest, among other regions.
The American Herbal Pharmacopoeia (AHP), in collaboration with United Plant Savers (UpS) as well as noted research botanist Kelly Kindscher of the University of Kansas and other acknowledged experts, is in the process of developing an AHP Monograph and Therapeutic Compendium for the North American native botanical osha (Ligusticum porteri).
Osha (Ligusticum porteri): The root of this high-country plant stimulates resistance to viral infections and reduces respiratory-tissue membrane inflammation.