I've dropped 20lbs in the last 8 weeks without really trying, although I think about 5lbs was muscle mass. Switched to somewhat of a ketogenic diet--low carb, medium protein, high fat--combined with intermittent fasting. First thing was to cut out sugar from coffee and use coffee cream or, preferably, whipping cream. The worst part is just having a bit of self-control, although I still enjoy a few too many carbs here and there, but can eat a lot of things like bacon, eggs, cheese, and butter. Just need to find the time and energy (both have been in shorter than usual supply since school started) to workout and get some muscle mass back.
Got all that from Jason Fung's
The Complete Guide to Fasting. Pretty interesting stuff, especially what fasting does for the body in general but can also cure type II diabetes, for example. It's all about insulin response.
https://www.amazon.ca/Complete-Guide...rds=jason+fung
Having said all that, now that I have benefits again, through school, I am going to try and get a food allergy test to see if there is anything I can improve on. Personally, I don't believe the hype about going gluten-free, unless one has an insensitivity. I've slowed down a bt with meat but could never cut it out. But...people just need to find what works for them and what is sustainable and motivating long-term.