Hello and Welcome to Spark People!
A good place to post your question is in the Diet and Nutrition Forum. I am sure someone there has the information you are looking for in that forum. Also, you might try do a Sparkpeople search to see if you can locate articles or recipes that address this as well.
I, myself, do not use protein/weight loss drinks, so no first hand information for you.
Good luck! Welcome to Spark People!
Jackie - Southern CA
Fit and Organized - Team Co-Leader
I am Radiant!
Exercise, eat healthy and stay positive. I know I will get there because I have faith. With faith and action, all things are possible.
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