WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY
Shark cartilage tablets. These tablets are popular in the herbal medical practices of countries like China. Chinese medicine is based on the theory of a universal life force, Qi, that is balanced in the body by the complementary forces yin and yang. Disorders are caused by an imbalance of these forces, and herbal remedies aim to provide a cure by restoring the balance.
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