You have a few years on me as I'm 1953 however I can tell you that twice in my life I lost over 100 pounds, the first time I was young only 33 and while quite heavy I was still fairly athletic, the second time I was 64 and not so athletic. I needed to lose the weight for knee surgery, however I couldn't do it like I did when I was younger, I needed help. At that time Mayo was using the HMR diet and it was just what I needed, it monitored my diet by making sure I had enough protein and then introduced fruits and vegetables to supplement. My guess, since I'm not a doctor and can only say what seems to have worked for me, is that once proteins, carbohydrates, and fats get out of balance our bodies will make us eat until it gets what it needs. If I didn't get enough protein, I would overeat but if that still didn't give me the proteins my body needed, it wouldn't use them and just stored them away. I'd have to keep eating until my body finally got what it needed. The trick is figuring out just what your body needs and give it only that. Yup, I'm still working on it.