There are several diets out there- particularly Keto, that people have had a lot of success with. In just 2 months I almost lost 30 pounds (call it water weight all you want) and it was a low carb, high fat diet. My bad cholesterol even went down a couple points, and I still feel like I have my muscles. There is a lot of research supporting this idea out there, if you realize that the FDA is probably bought out by people who make high-carb, high-profit foods.
The old school food triangle is garbage. Schools feed kids based on guidance from the govt and look what we get. Sugary sodas, high carb grains, meal replacement candy. None of this is for your health. The real problem is that none of it in combination is good for anything but heart disease and diabetes.
The studies on lchf have been out for a while and really put the pressure on the whole concept of shutting down glycogens and generating ketones. As noted in the study, bad cholesterol dives while good cholesterol spikes. I once saw a list of the most unhealthy processed foods that basically has every food group in a single meal. If you ate just one of these a day I think you are certain to die in ten years. Start with fresh meats, fish, nuts, creams and veggies. Leave the carbs for last. Live a long and healthy life.
People seem to forget that those who are 40 today have a good chance of living to 100. Do you want to spend the last 30 years of your life getting heart surgeries, popping blood pressure pills and overprescribed pharmaceuticals? You're just supporting an industry that thrives on your disabilities. Ditch them and the whole damned system of intolerance they offer.