Insights & Discussion
Berries, largely due to their phenolic compounds, enhance internal antioxidant status and positively influence gut microbiota composition, promoting beneficial bacteria and suppressing harmful types.
The study compared the antioxidant capacities and gut microbiota modulatory effects of nine popular berries: blackberry, black goji berry, blueberry, mulberry, red Chinese bayberry, raspberry, red goji berry, strawberry, and white Chinese bayberry. The anthocyanin profiles of each berry were identified using Ultra-performance liquid chromatography (UPLC) coupled with Triple TOF/MS. The antioxidant capacities were evaluated through four chemical assays (DPPH, ABTS, FRAP, and ORAC). Healthy mice were treated with different berry extracts for two weeks as a means of investigating in vivo antioxidant capacity and gut microbiota modulatory effects.
In terms of the results, it was observed that majority of the berries improved the internal antioxidant status, indicated by elevated serum or colonic Total Antioxidant Capacity (T-AOC), Glutathione (GSH), Total Superoxide Dismutase (T-SOD), Catalase (CAT), and Glutathione Peroxidase (GSH-PX) levels, along with a decrease in Malondialdehyde (MDA) content. All berries studied notably altered the gut microbiota composition, with most leading to the enrichment of beneficial Short Chain Fatty Acids (SCFAs)-producing bacteria and the curbing of potentially harmful bacterial types.
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Goji berry was identified as a rich source of antioxidant compounds, with health-promoting properties comparable with other common fruit species.
2015 Journal of Functional Foods Goji berry fruit (Lycium spp.): antioxidant compound fingerprint and bioactivity evaluation D. Donno, G.L. Beccaro, M.G. Mellano, A.K. Cerutti, G. Bounous
Systematic Review Antioxidant Goji Berry
A number of things lead to the confusion between the different species and genotypes of cultivated Lycium. In this study, wolfberry was identified as a rich source of antioxidant compounds; the observed analytical fingerprint demonstrated that the species represents a rich source of organic acids and polyphenolic compounds, especially cinnamic acids and catechins; this research suggested that identified nutraceuticals might contribute to the total phytocomplex of these fruits. This study developed an important tool to assess goji chemical composition and bioactivity, using different chromatographic methods for comprehensive authentication and quality control of its fruits: well-designed clinical trials with phytochemically well-characterized extracts are required before the potential of goji as a medicinal plant or food can be definitively assessed. Goji berry fruit is devoid of toxicity but caution is advised with regard to possible drug interactions as well as with products of unknown or dubious origin; for this reason, the development of rigorous quality control protocols for goji products is urgently needed: this research showed that analytical fingerprinting could be an important tool to assess quality, chemical composition, and bioactivity of wolfberry fruits, helping to find new sources of natural health-promoting compounds.
The antioxidants present in goji berries have comparable health-promoting properties to those found in other common fruits.
2015 Journal of Functional Foods Goji berry fruit (Lycium spp.): antioxidant compound fingerprint and bioactivity evaluation D. Donno, G.L. Beccaro, M.G. Mellano, A.K. Cerutti, G. Bounous
Systematic Review Antioxidant Goji Berry
The researchers studied the quality traits of goji berries and the levels of potentially fruitful compounds. They employed high-performance liquid chromatography (HPLC) - a technique widely-used to identify and separate components in a mixture - to examine the health-promoting compounds in goji berries, comparing these to what's found in other common fruits.
The researchers found that goji berries are a rich source of antioxidant compounds. It was determined that their health-promoting properties are akin to those of other common fruits. The characteristic "fingerprint" obtained through this study could help improve our understanding of this fruit, which is increasingly being recognized as a functional food due to its antioxidant properties.
Daily goji berry supplementation increases antioxidant levels and protects visual health in the elderly, though the exact mechanism remains unclear.
2011 Optometry and Vision Science Goji Berry Effects on Macular Characteristics and Plasma Antioxidant Levels Bucheli P, Vidal K, Shen L, Gu Z, Zhang C, Miller LE, et al.
Randomised Controlled Trial Antioxidant Eye Health Goji Berry
In a double-masked, randomized, placebo-controlled study, elderly participants were given either a milk-based goji berry supplement (13.7 g/d) or a placebo for a 90-day period. Eye health was assessed via direct examination to measure pigmentation and soft drusen count in the macula, and blood tests were done to determine plasma zeaxanthin level and total antioxidant capacity.
In the discussion of results, the placebo group showed signs of hypopigmentation and soft drusen accumulation in the macula, which did not occur in the group that received the goji berry supplement. The group supplementing with goji berries also showed a significant increase in plasma zeaxanthin levels and total antioxidant capacity, while no change was seen in the placebo group. There were no adverse effects of the supplement reported in either group.