This page contains links to all protein bars I know about. I also recommend other nutrition websites. There is a lot of good information here. I am not trying to tell you to buy a particular type of protein bar. I am trying to answer your questions so you can make better buying decisions and know what type of protein bars are the best for you. I hope I helped.
I don't know if a specific protein bar is going to help you lose weight. You should take all of your health and medical information into account when buying any product. This includes a review of the ingredients, nutritional information and health benefits. If you aren't sure if a particular product is good for you, talk to a professional nutritionist. There are many nutritional experts who have experience with protein bars, so talk to one who specializes in weight loss, as well. Some nutritionists are more familiar with dieting and can tell you the best diet for you. There are plenty of other people, like my wife, who don't have any particular interest in dieting. They can make recommendations based on their own experience with dieting. I am not an expert, and I don't recommend that you do anything in your diet based on my recommendations.