We prepare our Periwinkle extract from the leaf & flowering tips of Vinca major plants which are Certified Organically Grown and/or sustainably Wildcrafted in their natural habitat. To assure optimal extraction of Periwinkle's bioactive compounds, the plants are hand-harvested while in full flower, are carefully shade-dried to retain their full color and Aroma, and are then thoroughly extracted. Caution: Seek expert medical advice before taking during pregnancy.