Gut-brain axis

Scientists have found that when the stomach and brain are synced too strongly, it may signal worse mental health, linking anxiety, depression, and stress to an overactive gut-brain connection.

A study of nearly 400,000 people has for the first time found a causal link between gut bacteria and insomnia, confirming that some microbes aid sleep while others disrupt it. Fourteen bacterial taxa were found to contribute to the risk of insomnia.