Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Coix (Coix lacryma-jobi), also known as Job's tears or Yi Yi Ren in Traditional Chinese Medicine (TCM), is historically used to support kidney health and function. In TCM theory, coix is classified as a mild, sweet, and bland herb that enters the spleen, stomach, and kidney channels. It is commonly prescribed for conditions related to dampness accumulation, such as edema, urinary difficulties, and rheumatic complaints. The rationale for its use in supporting the kidneys is rooted in TCM’s view of the kidneys as central to water metabolism and the regulation of fluids in the body. Coix is said to promote urination and resolve dampness, thus indirectly supporting the kidney system. However, scientific studies specifically linking coix to improved kidney function or kidney support in the context of Western medicine are limited. Most modern research focuses on its anti-inflammatory, anticancer, and immunomodulatory properties rather than direct nephroprotective effects. Therefore, the primary basis for its use to support the kidneys is traditional rather than scientific. While its diuretic effects could theoretically aid in some conditions associated with kidney dysfunction, robust clinical evidence in humans is lacking, and its traditional use remains the mainstay of its reputation in this context.

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Nature's Sunshine Kidney Activator TCM
Nature's Sunshine Kidney Activator (Chinese)