All the talk of undoubted high calorie food and drinks, and sedentary life styles wiped away by this theory?
Yeah, once I read the adenovirus 36 research, I realised that obesity is in all probability a biological disease, just like diabetes and any other chronic disease.
Although it's likely that the increasing abundance of food also plays a role in the obesity epidemic. Food has become cheaply abundant in the last 50 years or so, thanks to high efficiency modern production methods.
If you had a metabolic disorder which caused you to put on fat, you may not become obese if you lived in an environment where food is scarce. Go back about 80 years, and most people only had meat once a week or so.
So I think if someone has a metabolic disorder which makes them retain too much fat, the abundance of food tends to bring that issue to the fore.
However, even with the current food abundance, there are many people who remain lean without ever needing to diet. Their metabolism just functions properly. You see this in families: some families have one child who is obese at a young age, whereas their siblings are lean.
So I don't think the abundance of food is the primary cause.
Just as with ME/CFS, I think there are a lot of misconceptions about obesity, especially when people are blamed for their obesity, and their lack of restraint in eating. I'd like to see more hardcore scientific research, and less of simplistic views on obesity that blame the individual.
Some people do overeat, it's true. But then that may be more to do with dysfunctions in appetite control, which may point to issues with the hypothalamus, the main area in the brain for controlling appetite.