The situation when a diet does not work is very common. You try hard but there is no effect. Or, rather, it works at first, but then starts to produce quite opposite results. But perhaps, the thing is whether you do it right or not.
First of all, mind that it is important to know your daily calorie intake. Contrariwise the presupposition of many diets that there is no need to count calories, it is better if you know. Otherwise, you eat more calories than you burn and you gain weight or stay the same. Or you eat less calories and you body gets used to storing fat for so-to-say “better times” and you definitely gain weight. There is no need to be obsessed with calorie count but if you really want to become slimmer figure out your ideal calorie intake.
It will be also only beneficial if you eat 6 small meals a day instead of 2 or 3 big ones. It affects your metabolism in a good way and controls your blood sugar levels; moreover, it eliminates with the constant urge to overeat or have sweets. It will be good when you understand which is an optimal “food portion size” for you and stick to it throughout the day. We tend to eat bigger portions and then to wonder where all the fat comes from! People before 1950s were thinner because the portions in the restaurants were normal. Now go at the restaurant and have a look. That is why it is recommended to share. You will only feel better.
It is recommended that you do not exceed the limit of 250 calories per each mini meal (which is 1500 calories for a day) if you are a women; and there is 50 additional calories at each meal if you are a man. Try to stick to this schedule. You will see it is not easy. That is why you should know what you eat and how nutritious it is. For instance, if you have 2 large eggs scrambled, 1 slice multi grain dry toast, and an 8 oz. orange juice you will get 412 calories. 350 calories will come from 1 fat free yogurt and 1 granola bar; and 389 calories you will get from 1 cup pasta, ½ cup marinara sauce, and 1/2 cup green beans. That is why you are very much advised to keep a food journal and also control your portions throughout the day.
What concerns different protein shakes and bars they are great for building fat burning muscle but they should be taken with care. People tend to over-do with protein supplements and this is not very good actually because proteins are great help but their intake should be adjusted in order for the excess not to be stored as fat. All in all, you should have a clear picture of what you eat and in what amounts if you really want to change something in the way you look.