4 oz Yohimbe/Pausinystalia johimbe Extract This item is not available for shipment to Canada or Norway. We prepare our Yohimbe Extract from the bark of Pausinystalia johimbe trees which are Custom Wildcrafted especially for us in their wild native habitat in Cameroon, Africa. To assure optimal extraction of Yohimbes bioactive compounds, the bark is handharvested and carefully dried, and is then shipped directly to our laboratory and thoroughly extracted. Our Yohimbe is never fumigated or irradiated. Dry herb / menstruum ratio: 1 : 5