Royal jelly enhanced the antioxidant activities and modulated the gut microbiota in healthy mice.

Royal jelly (RJ) is a well-known traditional health food that has a wide range of pharmacological activities. In this study, mice were fed with different doses of RJ for 30 days and their antioxidant activities and gut microbiota were measured to examine the correlation between gut microbiota and overall health. RJ did not influence the feed consumption or relative organ weight, but RJ did increase the amount of serum interleukin 10 (IL-10), as well as the levels of antioxidant activities in the liver and kidney. The middle dose of RJ (RJM) decreased the relative abundance of Proteobacteria at phylum level, increased the relative abundance of Lachnospiraceae_NK4A136_group and Bacteroides. Correlation analysis indicated that RJ could optimize the functional network of gut microbiota and the interactions between the gut microbiota and the host. In conclusion, RJ could enhance the antioxidant activities and modulate the gut microbiota. RJM treatment had a more positive effect on physical health compared with RJL and RJH treatments. PRACTICAL APPLICATIONS: Royal jelly is a healthy dietary supplement which has a wide range of functions. The research helps us know the action mechanism of RJ in healthy body and analyzed the correlation of gut microbiota and physiological state. The appropriate dose of RJ was also studied and the health functions of RJ for healthy body were proved. This research could help to increase the RJ consuming in market.