Herb Pharm Wild Yam Liquid Herbal Extract Description. Organic Liquid Herbal Extract. Dioscorea Villosa. Whole Rhizome. We prepare our Wild Yam extract from the rhizome of Dioscorea villosa vines which are Certified Organically Grown especially for us in their native forest habitat in eastern Kentucky. To assure optimal extraction of Wild Yams bioactive compounds the rhizomes are hand-harvested only in late autumn are carefully shade-dried and are then thoroughly extracted. Our Wild Yam is never fumigated or irradiated. Disclaimer These statements have not been evaluated by the FDA. These products are not intended to diagnose treat cure or prevent any disease. Shake well before using. Two to five times per day take 30 to 40 drops in a little water. Ingredients: Certified organic grain alcohol distilled water and wild yam extractives. Warnings May cause nausea with larger doses.