Having sensitive digestion, particularly a sensitive colon, can have a big impact on your day-to-day life. People with "iron stomachs" simply don't understand how much it can affect everything you do.

When you have a sensitive digestive system, problems can be triggered by stress, certain foods, or caffeinated or carbonated beverages. Sometimes, there doesn't seem to be any trigger at all. Before you know it, though, you're rearranging your whole life to accommodate it.

CNN News

...”Because it can be hard to get good bacteria through diet alone, many people are turning to supplements. And increasingly, food companies are finding ways to add good bacteria to more of their products.”