You can't neglect reversion to the mean here. People with below-average diet end up with below-average results. If you stop eating your below-average diet and r

You can't neglect reversion to the mean here. People with below-average diet end up with below-average results. If you stop eating your below-average diet and replace most foods in it with anything else, it'll probably be a closer-to-average diet and give you better results.