Age? Yes. But the efficient scientists in Ireland have come to a conclusion, that EVERYONE lies about their weight.  Myself included.  I'll usually subtract one or two pounds.  Don't judge me.  You do it too. 

--Here's a breakdown of how many pounds the average person shaves off their weight . . .

--A guy who's obese:  Five pounds.

--A guy's who's overweight:  Two pounds.

--A guy who's normal weight:  One pound.

--A woman who's obese:  Six pounds.

--A woman who's overweight:  Three pounds.

--A woman who's normal weight:  One or two pounds.

 

SOURCE