I also want to comment on how smart you are listing "fit and healthy" as your goal, not "thin and healthy". "Thin" is not necessarily attainable, be it through hereditary obesity, psychoactive drugs, efficient microbes in the gut, or what not. "Fit" is an attainable goal. You can be fit at every size. I encourage you to look up HAES - Health At Every Size - approach that has been clinically proven to be superior in health outcomes to traditional weight-centric approaches.