If you believe you can shed pounds quickly by force of will and deprivation, you will in all likelihood not only regain the ones you lost, but add a few more besides.
In France we have a saying, 'Joie de vivre,' which actually doesn't exist in the English language. It means looking at your life as something that is to be taken with great pleasure and enjoy it.
There is no lasting glory in rapid weight loss.
In the U.S., too many yogurts are filled with corn syrup, preservatives, artificial this and that. To me, this is poison.
Just as established products and brands need updating to stay alive and vibrant, you periodically need to refresh or reinvent yourself.
Quality of life is very important in France. I have many friends who turned down promotions and more money because it would affect their quality of life as a couple or a mother.