My surgery was 1 Oct 2014 and from the start was told minimum of 60g of protein per day. I had heard, and now experienced first hand, that lack of sufficient protein can result in hair loss. If I am under 80g a day I notice a lot of hair loss. Keep up your protein, it not only helps with weight loss, but side effects! As for carbs I was told to keep under 15g carbs per meal.
I also like the Syntex Nectar brand of protein powder. I have been having a cup of decaf coffee with the vanilla bean torte powder in the morning. Delicious! The Chocolate is also fantastic and I drink it with cold water. Another way I add protein is the unflavored protein to food. Just check the temperature first on all things to make sure they are below 140degrees. Good luck!