Di Huang | Sheng Chinese Herb | Rehmannia Root Herbs - Suitable to Clear Heat and Cools the Blood - Medicinal Grade Chinese Herb 1 Lb - Plum Dragon Herbs Di Huang | Sheng - Rehmannia Root is a Traditional Chinese Medicine which cools the blood Geo authentic herbs, sulfur free, lab tested and sourced indigenously Rehmannia Root, also called Chinese Foxglove Root. It Clears Heat and Cools the Blood Di Huang is sweet, bitter, cold and Enters through the Heart, Kidney and Liver Medicinal Grade Chinese Herb