The key to losing weight is cutting calories.

So, if you cut hundreds of calories a day then you are bound to shred pounds of fat away, right?

Actually, that’s not always the case. Betsy Varghese, M.D., a board certified internal medicine and obesity medicine physician at Hackensack Meridian Health Medical Group, explains in our latest podcast that you might be undereating.

If you aren’t eating enough, Dr. Varghese warns that you may actually not be able to lose weight—and you may be faced with a few additional unhealthy side effects.