Some people don't have gut problems from birth no matter what they do
Some people are constantly on antibiotics if they get sick, smoke, drink, eat beyond unhealthy do drugs and dont have gut problems.
Someone else who tried to be healthy their whole life always has gut problems. Also it seems like a lot of times it runs in the family.
I understand for a healthy gut you would want good mmc, motility, bile and acid. But these 2 people both ideally have that.
Is it microbiome? If it was.. why the person who takes antibiotics all the time when they get sick doesnt destroy their gut?