I don't know if you're thin or overweight. I'm fat, always have been. I'll admit to a past of bad eating habits that put me where I am. But the point is that we

I don't know if you're thin or overweight. I'm fat, always have been. I'll admit to a past of bad eating habits that put me where I am. But the point is that we live with an excess of calories around us. If I have a certain kind of over-efficient gut bacteria helping me out, the survival mechanism in my situation supports the less-efficient variety. Too many calories, whatever their source, has a huge negative effect on my life.