Oh, in terms of real world results, it's definitely an ongoing process of experimentation and adjustment. I have no background in the field so I can't claim much expertise, but it seems the profession is just starting to scratch the surface of the relationship between food, age, hormones and weight gain.
For now, I think it's much more important to change your habits and mindset around eating, then see how your body responds.
When I did something similar, it worked great for a while, but rather than the weight loss stalling, I started gaining weight. If I don't severely portion control basically everything except green vegetables, I gain weight.
I should note that this was just once I reached my mid 30s that this became an issue; prior to that an so long as I exercised regularly, my appetite and my weight were better matched.