ESSIAC®is a proprietary blend of burdock root, slippery elm bark, sheep sorrel leaves and Indian rhubarb root. All of the herbs used in ESSIAC® products are sourced and extracted for their active properties in Canada. The herbs in ESSIAC® are grown specifically for ESSIAC® Canada International and are harvested at peak times in order to ensure maximum botanical potency. ESSIAC® is approved by Health Canada and is shipped worldwide.