"Belly bloat, diarrhea and constipation, and irritable bowels may not seem like the sexiest topics-but they still affect thousands of Americans every year. Rather than focusing on a single approach, Regular aims to help readers identify the likely cause of their irregular bowel symptoms with a wide variety of more personalized solutions. For example, Freuman explains that, while a high fiber diet that might help someone with opioid-induced constipation,...