Evidence supporting the use of: Rehmannia glutinosa
For the body system: Male Reproductive System

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Synopsis

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

Rehmannia glutinosa is primarily used in Traditional Chinese Medicine (TCM) to support the male reproductive system, especially in formulations targeting "kidney" health, which in TCM theory is closely associated with sexual vitality, fertility, and hormonal balance. Historical texts and modern herbal compendia describe the use of Rehmannia root (both raw and prepared forms) in remedies designed to address symptoms such as impotence, premature ejaculation, and reduced libido. The root is often combined with other herbs like Morinda officinalis, Eucommia bark, and Cuscuta chinensis in classic formulas such as Liu Wei Di Huang Wan and Jin Gui Shen Qi Wan, both of which are aimed at nourishing the "kidney yin" and "kidney yang," concepts that TCM practitioners associate with reproductive function and vitality.

While some laboratory and animal research suggests potential effects of Rehmannia on hormone regulation and testicular protection, robust clinical evidence in humans is lacking. Most modern support for its use in the male reproductive system still relies on centuries of traditional use rather than strong scientific validation. Therefore, the justification for using Rehmannia glutinosa in this context is best categorized as traditional, with a moderate level of evidence based on longstanding historical use but limited scientific corroboration.

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