Lol Galileo over here. My comment was indeed a personal anecdote, nothing more. And I only wanted to establish that physiological factors like diet, exercise, and sleep, are not the ONLY contributors to major clinical depression. I'm pretty sure you agree? And you're saying there are MORE physiological factors (gut biome, gum health, etc), and... I don't disagree. The only purpose of my comment was to put to bed the assumption that some people have, which is that depression is purely, surface-level physiological (like just exercise/sleep/diet, not taking into account genetics, environment, stress, and all the other factors)