Editorial: World digestive health day: investigating the link between neurodegenerative disease and gut microbiota

Neurodegenerative diseases (NDs), such as Alzheimer's and Parkinson's disease (PD), are debilitating conditions that affect millions of people worldwide (Ghosh et al., 2020). Research has shown that there is a potential link between these diseases and the gut microbiota, which is the collection of microorganisms that live in our digestive tracts. This link is known as the gut-brain axis, which suggests that the gut and the brain are interconnected and can influence each other's function. In recent years, there has been growing interest in investigating the mechanisms that underlie this relationship and the potential implications for treating and preventing NDs. Through this Research Topic, we tried to examine the current state of research on the link between neurodegenerative disease and gut microbiota. Specifically, we explored the gut-brain axis and its relevance to these diseases, the potential mechanisms that link gut microbiota and NDs, and the key findings from recent studies investigating this link. We hope future research will provide a better comprehension of the liaison of NDs and gut microbiota and the potential implications for future research and treatment.