Hello, Your question is with regards to a low carbohydrate, high protein supplement that you might use, not about a meal plan.First, the kidney stones. Dehydration is the commonest cofactor in the development of kidney stones along with heridity. A kidney stone diet requires medical nutrition instruction so lets go with prevention and drink 8-10 gasses of water per day which will also help with the weight issue. A line of products that I recommend is the Pure Lean line of protein powders, supplements to assist in the weight loss process and they are all put out by Pure Encapsulations available only to health care providers. My store is located at http://www.virtualnutritionalsynergy.com and under the supplement link you will find a pure encapsulation store. Other than that, I can t think of another brand right now that is safe and effective. I recommend that you see a dietitian for a full consult and personalized meal plan to help you. Good luck!