How long have you been "dieting"? Most people can say they have tried at least one fad diet, but most people have tried many over the years. Chances are you didn't stick with it though.
I'm going to tell you a secret.
Fad diets are just that, fads. They come and go just like fashion. We hear of some new trend that will help up lose weight faster and easier while we get to eat all the foods we love (read: all the foods that kept us feeling like we needed to diet in the first place), and all we need to do is ________. I'm sure you could fill in the blank with dozens of things; count calories, eat more protein, eat 6 times a day, eat once a day, take this pill, drink this shake, and I could go on and on.
Diet culture is full of restrictions and all of those restrictions make you feel like you're dieting and all you end up focusing on is what you can't eat or the fact that making meals takes longer because you need to weigh or measure everything. Plus, when you cut out major entire food groups (like grains), you may also be missing out on vital nutrients!
If any of the fad diets were really sustainable, chances are you would have stopped reading this because you'd already be completely happy and healthy just the way you are.
These are all common issues with these diets. Be weary of any diet that requires you to buy a product or even forces you to count calories for the rest of your life. Food is a major component of overall health and there are plenty of well-meaning people (or maybe money-hungry people too) who will sell you on some plan but really have no knowledge of how it truly affects the body.
I can't stress enough that food is intimately linked to your overall health, which is why you often see the disclaimer "Consult your physician before starting a new diet.". Not everyone who puts a diet plan together has any sort of background in nutrition. They may not understand that there are some people who absolutely should not follow the plan they have laid out because it's just plain dangerous to do so. They may not understand that the restrictions they've put in place are severely cutting nutrients and may affect vitamin and mineral levels in a person's body.
Food is fuel and we wouldn't put the wrong fuel in our car, so let's make sure we're putting the right fuel in our bodies!
If you know you need help with nutrition, seek the advice of a health professional that has an education in nutrition. Don't get stuck on the roller coaster of fad diets and gimmicks!