Evidence supporting the use of: Goji
For the body system: Eyes

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Synopsis

Source of validity: Traditional
Rating (out of 5): 3

Goji berries (Lycium barbarum), also known as wolfberries, have a long history of use in Traditional Chinese Medicine (TCM), particularly for supporting eye health. In TCM, goji is believed to "nourish the liver and kidney," organs thought to be closely related to the health of the eyes. Ancient Chinese texts frequently mention the use of goji berries to improve vision, treat blurred sight, and maintain overall eye function. This traditional use is based on empirical observations over centuries rather than modern scientific validation.

Modern research into goji berries has identified high levels of antioxidants, especially zeaxanthin, which is known to accumulate in the retina and may help protect against oxidative stress and age-related macular degeneration (AMD). Some small, preliminary studies have suggested that goji supplementation can raise plasma zeaxanthin levels and may have a protective effect on the retina. However, evidence from large, rigorous clinical trials is lacking, and the direct effect on human eye diseases remains uncertain. Thus, while there is a plausible scientific rationale and some supportive data, the primary justification for using goji for eye health is rooted in tradition.

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