> Just consider that all it takes to become 100 lbs overweight by age 50 is an extra 38 calories a day starting at age 25. Source? Sounds very hard to believe,

> Just consider that all it takes to become 100 lbs overweight by age 50 is an extra 38 calories a day starting at age 25. Source? Sounds very hard to believe, when you starting getting weight from that 38 calories you also start to require more energy to do the same thing, just because you weight more. And there are a ton more factors to add, the human body is not as simple as that.