Publications

Research outputs, reports, policy briefs and knowledge products from KIU scholars and partners.

2025 School of Pharmacy IDOSR JOURNAL OF EXPERIMENTAL SCIENCES

Medicinal Plants as Modulators of Gut Microbiota

Waiswa Arajab

The human gut microbiota is a complex and dynamic microbial ecosystem that plays a central role in health and disease. Dysbiosis, caused by factors such as diet, antibiotics, and stress, is associated with metabolic, inflammatory, immune, and neuropsychiatric disorders. Medicinal plants represent a promising strategy for modulating gut microbiota due to their diverse phytochemicals with antimicrobial, prebiotic, antioxidant, and immunomodulatory properties. Compounds such as polyphenols, flavonoids, terpenoids, alkaloids, and sulfurcontaining molecules can selectively inhibit pathogens while stimulating the growth of beneficial bacteria and enhancing short-chain fatty acid and vitamin production. Well-studied plants, including garlic (Allium sativum), ginger (Zingiber officinale), turmeric (Curcuma longa), peppermint (Mentha piperita), and chamomile (Matricaria chamomilla), demonstrate the ability to reshape microbial communities, strengthen the gut barrier, reduce inflammation, and influence systemic functions, including immunity and mental health. Preclinical and clinical studies highlight both antimicrobial and prebiotic effects, though variability in plant composition, dosage, and host microbiota remains a challenge. Standardization, mechanistic studies, and integration with probiotics and prebiotics are necessary to advance the therapeutic potential of medicinal plants as microbiota modulators.