Synopsis

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

Lycium, commonly known as goji berry or wolfberry, has been used in traditional Chinese medicine (TCM) for centuries, particularly to support eye health. In TCM, Lycium fruit is believed to "nourish the liver and kidney," which are thought to play a critical role in maintaining healthy vision. Historical texts, such as the "Shennong Ben Cao Jing" (Divine Farmer's Materia Medica), reference Lycium as beneficial for "brightening the eyes" and improving visual acuity, especially in cases of age-related decline.

While there is a rich tradition supporting its use, modern scientific evidence is emerging but still incomplete. Some laboratory and animal studies suggest that the carotenoids (notably zeaxanthin) and polysaccharides in Lycium berries may help protect retinal cells from oxidative stress and may slow the progression of certain degenerative eye conditions. However, large-scale, high-quality clinical trials in humans are limited. Most of the support for Lycium's effects on eye health is therefore based on traditional use and preclinical research, with only modest scientific backing so far.

In summary, Lycium's role in supporting the eyes is primarily justified by tradition, with a moderate level of scientific plausibility, but more robust human studies are needed to confirm its efficacy.

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