Xie’s Jingtang Herbal Rehmannia 11

Rehmannia is thought to nourish the yin, the qualities of which include coolness, dampness, and a downward direction. The Rehmannia root is dark brown in colour, and with its high viscosity, it was once thought to be ideal for settling the qi and drawing it downwards, so that it can flow properly throughout the body. Its original uses ranged from healing broken bones, removing blood impurities, and encouraging muscle growth, to treating fevers. Additionally, it was considered as a tonic for the liver and kidneys—not necessarily the actual organ systems, but the ancient Chinese concept of these systems and their role in aging, building strength, and their interconnectivity with other parts of the body.