Originally Posted by
john423
Human body? more complex than calories in, calories out
Weight loss? calories in, calories out
Simply speaking you lose weight when you lower your basic caloric needs over time.
The problem arises when your body adapts to compensate for the lack of calories or changes in activity level. Hence the complexity.
Although we are all very similar, we are just a little different in how we process calories. If we all followed someones diet plan and activity level to the exact letter many still wouldn't produce the same results. Probably similar, but not exact results.