Absolutely. I always tell people there is no denying thermodynamics. If calories in is smaller than calories out, you can't help but lose weight. The other thing is somewhere along the line, I had to find a new "normal." If you don't like your new lifestyle, it won't stick. I'm hoping I've achieved this but only time will tell....Research-based fact is that cutting calories is the most important part in losing weight, much more important than exercise. However, without regular exercise, chances are slim to non-existent to maintain your lowered weight. So, getting into that routine as early as possible is a good idea...