[bbosh]

Here's another experiment. Eat 500 calories of 50% fat, 50% sugar. For example, ice cream. You'll feel much hungrier than both a fat and sugar only diet. It's fat and sugar combined that cause obesity problems.

[eclipxe]

I agree. Sugar (in some people) can cause the storage of extra calories - if those calories are from fat, it will be stored.

Here's another experiment - take 300 million people, tell them to eat primarily carbohydrates and limit their fats. Observe the trend for 30 years.

[vinceguidry]

I eat a pint of ice cream as a meal on rare occasions, it fills me up and I'm only a little hungrier than normal when the next meal time comes round, which I attribute to a pint of ice cream not having as many calories as a typical meal.