"If a different gut flora makes a substantial difference in obesity levels, is it then not reasonable to consider obesity at least partially a treatable medical condition?"

Because it can very easily be treated by simple life style changes. Buy people simply chose not to citing ever excuse under the sun.

"It is also not very helpful to anyone who struggles with obesity to be told the "proper solution is in the psyche of the afflicted" unless you also have a way of fixing that (if you you do have a way of fixing that, market a diet and you'll become a billionaire). Absent a way of giving everyone willpower to stick to strict enough diets, we should welcome other alternatives too."

Really? So, don't tell depressed people it is psychological? Pop a pill?

Market a diet? Psychology is not a diet.

I really don't care if obese people want to be obese, and give ti the I am what I am thing, but please, quit these absurd excuses. All the vast majority have to do is eat well and exercise. Just minor adjustment will gradually help. They don't have to become health food freaks and Olympic athletes, just make gradual adjustments. But no, they prefer sit an watch TV, while stuffing their faces with crap food and drink.

Sorry, but this drives me nuts. I know many obese people, and its the fault of every single one. And, its no shock to them. They know. They make their excuses, and know they are excuses. They all know the solution is simple life style changes, but the chose to remain following their current life style. In that, I support their choice.