Anecdata where the data set is N=1. Similarly, from my circle I have a complete reverse example. Multitude of health problems that went away after going to r

Anecdata where the data set is N=1. Similarly, from my circle I have a complete reverse example. Multitude of health problems that went away after going to raw vegan diet. IMHO a very extreme diet, but if it's the only (discovered) thing that helps, then why not.