For me it is more about fiber. I have been diagnosed with holes in my transverse colon and stomach. Years ago a surgeon found a large gash in the lowest part of my small intestines and patched it, while removing my gallbladder. Eating lettuce helps my digestive tract to be able to move properly. When I was a kid, my dad was caught adding some powder substance to our dinner. He told my mom it was phosphorus. Right around that time, I started having severe stomach problems. I also had a relative offer me a drink of what he said was juice, from a plastic cup, when I was about six years old. People later said it was battery acid when I told others that it didn’t taste right. My stomach and bowels have had a lovely life. Healthy foods help.