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How does aging affect jing? An exploration of essence, vitality, and longevity

According to Traditional Chinese Medicine (TCM), the aging process is mainly attributed to the gradual depletion of *jing* or essence. This vital substance, stored in the Kidneys, is considered the foundation of life and health, with a fixed amount inherited at birth that diminishes over time. Understanding how does aging affect jing is key to promoting vitality and slowing down age-related decline.