[eye sea]

Originally Posted by James

Our genes play a big part in deciding our weight. You see in ancient times our ancestors had to scavenge for any food they could get. Having a strong appetite is probably something that evolved because it was useful for our survival in those days.

Forward to modern times, and we live in a world (at least in the West anyway) where food is plentiful. However we still have genes which tell us to eat at every opportunity. Hence some people eat too much.

Partly right, but it isn't all to do with what we eat.

An average, moderately active 19 year old can consume 5,000 calories per day, yet someone in their mid 30s on 2,500 calories per day can still gain substantial weight.

Look at the gangly teenagers walking the street, thin as poles, their jeans hanging down their butt cheeks. That after consuming numerous pizzas, chips and fizzy pop all day.