What programme was it?

[elerrina]

i watched a bbc program (i think it was) where they were talking about weight loss and they had two people on their one slightly overweight and one under i think and were seeing what effects things had on their bodies, but they mentioned metabolic rate and they said that overweight people did have a slow metabolic rate like it was always said and that people who were overweight just over eat, and i was wondering if anyone knew what program this was it would be very helpful, thanks