Herb Pharm Periwinkle Extract Liquid Herbal Extracts Description. Liquid Herbal Extract. Vinca Major. Flowering Tips And Leaf. We prepare our Periwinkle extract from the leaf and flowering tips of Vinca major plants which are Certified Organically Grown and/or Custom Wildcrafted in their natural wild habitat. To assure optimal extraction of Periwinkles 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. Our Periwinkle 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 or three times per day take 20 to 30 drops in a little water. Ingredients: Certified organic grain alcohol distilled water and periwinkle extractives. Warnings Seek expert medical advice before taking during pregnancy.