Synopsis

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

Goji berry (Lycium barbarum) is used to support the management of free radical damage primarily due to its antioxidant properties. Scientific studies have identified that goji berries are rich in bioactive compounds such as polysaccharides, carotenoids (notably zeaxanthin), flavonoids, and vitamins C and E, all of which contribute to their free radical scavenging activity. In vitro and animal studies have demonstrated that goji berry extracts can increase antioxidant enzyme activity (including superoxide dismutase and glutathione peroxidase) and decrease lipid peroxidation markers, suggesting a protective effect against oxidative stress.

Some small-scale human studies have also reported increased antioxidant capacity in the blood after goji berry supplementation, as well as improved markers of oxidative stress. For example, a randomized, double-blind, placebo-controlled trial published in the journal “Nutrition Research” in 2008 found that daily consumption of goji berry juice improved antioxidant status and general well-being in healthy adults.

However, while preclinical and clinical data support the antioxidant potential of goji berries, much of the human research is preliminary and limited by small sample sizes and short durations. Larger, well-controlled studies are needed to confirm these effects and their clinical significance. Overall, the use of goji berry for supporting the body’s defense against free radical damage has a basis in both its traditional use and emerging scientific evidence, with a moderate level of validation.

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