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fructus zingiberis nigri, known as "Alpinia oxyphylla" in scientific nomenclature,

is a plant species belonging to the family Zingiberaceae. This herb is native to Southeast Asia and is widely used in Traditional Chinese Medicine (TCM). The seed of Alpinia oxyphylla is specifically utilized for its medicinal properties.

In TCM, Yi Zhi Ren is considered to warm the interior, strengthen the stomach, and support the kidney's 'Qi' (vital energy). It is commonly used to treat diarrhea, cold limbs, vomiting, and other symptoms associated with 'cold' conditions in the body, particularly those related to 'Kidney Yang' deficiency as per traditional Eastern diagnosis.

The active compounds in Yi Zhi Ren include diarylheptanoids, flavonoids, and glycosides. These constituents are believed to contribute to its pharmacological effects, which may include anti-inflammatory, antiemetic, and gastrointestinal protective actions.