Q: hi mike im very curious about the human body , its like today what i eat , does it immediately converts and stores the excess as fats

A: Great question! To some degree, yes, but it is definitely oversimplifying things. The processes of using energy and storing energy (both as glycogen reserves in muscles and organs and as fat reserves) are continuous in your body and continuously happen in a million different places. An act of eating provides a large influx of new energy, so it may slow down some of the existing processes that 'mine' old energy reserves for awhile and accelerate some of the existing energy-storing processes. But the notion that all new calories are immediately either used or stored as fats is an oversimplification. Check out my answer to http://www.mikesfitness.com/content/how-does-body-burn-fat-and-muscle for more related discussion.