Hi Kiwi33,

You explained very nicely in your post as to what happens when one eats less than the BMR daily. But how would a person know what is his BMR ?

Also I have one more query.

Consider the process just for a single day. Say I do not exercise at all and my BMR is 1900 and I eat 1200 calories today. I have a lot of fat say 25kgs surplus above ideal BMI. So will it burn 700 calories of fat to get the energy or will it burn 500 calories of fat and 200 calories of muscle tissue ? In other words,what I wish to ask is will it take all the energy from the excess fat available till it is exhausted or will it take some from the excess fat and some from the muscle tissue ?

Thank you.

Amit.