Chinese Ligustrum berry, also known as Ligustrum lucidum or "Nu Zhen Zi" in traditional Chinese medicine (TCM), is historically used to support liver and kidney health, particularly in the context of "yin deficiency." However, its use for treating or preventing kidney stones specifically is based primarily on traditional concepts rather than direct scientific validation. In classical TCM, Nu Zhen Zi is thought to nourish the liver and kidneys and is included in formulas intended to strengthen these organs, which are believed to play a broad role in fluid metabolism and urinary health.

There is minimal scientific evidence directly supporting the use of Ligustrum lucidum berries for the management or prevention of kidney stones. While some studies have explored the antioxidant and immunomodulatory effects of Ligustrum extracts, these do not specifically address kidney stone formation, dissolution, or prevention. No randomized clinical trials or robust preclinical studies have demonstrated a direct effect on kidney stones.

In summary, the association between Chinese Ligustrum berry and kidney stone treatment is rooted in traditional Chinese medicine principles rather than supported by modern scientific research. The overall evidence for this specific use is limited and rates low on the evidence scale.