https://www.nccih.nih.gov/health/probiotics-what-you-need-to-know
"However, in most instances, we still don’t know which probiotics are helpful and which are not. We also don’t know how much of the probiotic people would have to take or who would be most likely to benefit. Even for the conditions that have been studied the most, researchers are still working toward finding the answers to these questions."
There are a lot of studies cited below, and most of them non clear about that relation.
ciclidae t1_ja4jzef wrote
Reply to comment by UgeMan in New research establishes a link between irritable bowel syndrome and mental health challenges, such as anxiety, depression, and suicidal ideation by thebelsnickle1991
https://www.nccih.nih.gov/health/probiotics-what-you-need-to-know "However, in most instances, we still don’t know which probiotics are helpful and which are not. We also don’t know how much of the probiotic people would have to take or who would be most likely to benefit. Even for the conditions that have been studied the most, researchers are still working toward finding the answers to these questions."
There are a lot of studies cited below, and most of them non clear about that relation.