From the Vendor: Our Pure Yellow Kratom powder is 100% Green vein. The lighter quality of this strain brings the name and reveals both purity and potency of this particular leaf. Pure Yellow is distinctive to the Ketapang district, West of the Kalimantan region in Indonesia which hints to the yellowish color it brings. This unique color is brought about by the fermentation methods we use and the potency levels it brings. Our harvesters are bringing both quality and potency with this particular strain and our customers love it.