According to the World Health Organisation, a sixth of the world's population is overweight - most of it due to the over-consumption of fast food and lack of exercise.
Americans spend over a hundred-billion US dollars on fast food every year. Globally, our consumption of burgers, pizzas, fried chicken and chips has also increased.
I personally believe that most people are drawn toward hot fatty food, little knowing that in most cases it's the salt and sugar that really draws them in.
If you served a doughnut minus the sugar, or french fries minus the salt, the sales would definitely go down.
I feel if we take salt and sugar off the planet (rather than fat) we would have a slimmer race of people.