Probiotics for mental health

Professor Colin Martin
has co-authored:

Probiotics in Mental Health 

From the website:
The concept that the gut and brain are intricately linked is widely accepted not just within the lay community but increasingly within scientific and therapeutic circles as well. Terms such as "heartache" and "gut wrenching" are more than mere metaphor, they represent key fundamental aspects of human experience which all individuals will invariably endure from time to time. The relationship between the gut and brain is complex but fundamental to health and wellbeing. Increasing and compelling evidence supports the existence of a relationship between the health and status of the gut and the manifestation of significant psychopathology.