(Natural News) Patients with depression often experience gastrointestinal distress, a group of digestive disorders marked by lingering symptoms, such as constipation, bloating, diarrhea, abdominal pain and cramping. According to a study published in the journal Gastroenterology, the two disorders are connected by a common cause: low levels of serotonin, also known the “happy chemical.” Depression and gastrointestinal distress go hand […]