The fructose in fruit isn't as easily absorbed due to fibre. Also there's a natural limit to how much we can consume, no one eats 20 oranges in one sitting.
Nevertheless we are physically limited by our stomach capacity and would be very unlikely to consume bioavailable fructose at the rates made possible by industrial fructose such as HFCS.
@msage even that isn't as hard on the liver as processed orange juice that has no fibre in it. But it's the things that have extra fructose added into them that I would be wary of.
An Australian guy did a documentary where he ate the exact same number of calories he'd eaten before, and worked out just as much, but he went for food with added fructose. It's really interesting.
The study is not saying that fructose is the root cause of obesity from what I see (search doesn't work properly there). I'm not sure if in such a complex mechanism as a human body a single cause of obesity can exist. Additionally, our bodies differ and a single mutation can change the outcome of the whole process from what I know.
The title is so misleading that it borders on lying.
The root cause of all obesity everywhere is not fructose. That implies that if you don't eat fructose or generate fructose, you will not be obese. Fructose might be contributing factor to obesity, but it is hardly a root cause or "the" root cause.
I overstepped on my comment but after years of being vehiculated as an healthy sugar, this is the kind of title capable of triggering that sort of thought.
And agreed. It may be a part of the problem but it is risky to say this or that is the root of the obesity problem.