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Kidney Yin

Meaning

Kidney Yin is a fundamental concept within Traditional Chinese Medicine (TCM) that, when translated into modern physiological terms, relates to the nourishing, cooling, and foundational substance of the body, often corresponding to the parasympathetic tone, deep fluid reserves, and the regulatory capacity of the adrenal axis. A deficiency in Kidney Yin clinically manifests as symptoms of ’empty heat,’ such as night sweats, dry skin, insomnia, and feelings of internal restlessness, which frequently overlap with signs of adrenal fatigue or declining sex steroid production in Western endocrinology. This concept represents the vital, restorative reserve that underpins long-term vitality and hormonal balance.