Background: Currently, daily consumption of green herb functional food or medicinal herbs has gained
many followers worldwide as a way of life or even as an alternative to the use of synthetic medicines.
Phytochemicals, which are series of compounds of relatively complex structures and restricted
distribution in plants, usually perform the defensive functions for plants against insects, bacteria, fungi
or other pathogenic factors. A series of studies have found their effectiveness in the treatment or
prevention of the systemic diseases such as autoimmune diseases, cancer, neurodegenerative diseases,
Crohn's disease and so on.
Objective: This review has literature systematized the mechanisms of the
phytochemicals to react against unique free radicals and prevent the oxidative stress and also summarized
their role on gut microbiota inhibiting bacterial translocation and damage to the intestinal barrier and
improving the intestinal membrane condition.
Conclusion: The gut microbiota modulation and
antioxidant activities of the phytochemicals shall be emphasized on the research of the active principles
of the phytochemicals.