Found this site looking for info on how to check body fat % as a guide to tone versus just lose weight. Besides food and exercise, I want to be more fit.
They share knowledge (exercise, food and information) and sell coaching services as it is hard for everyone to not diet but make it a lifestyle. It resonates with me.
First link I found. then from it some pertinent links with info on food and people. https://www.nerdfitness.com/blog/body-fat-percentage/
This link was an obvious to explore after reading that far in above link. https://www.nerdfitness.com/blog/why-cant-i-lose-weight-heres-the-truth/
Then the third link in nine in the first paragragh made me think beyond food and exercise. Interesting read. https://www.nerdfitness.com/blog/why-cant-i-lose-weight-heres-the-truth/#metabolism_calorie_deficit
Which gets you to a scientific explanation of why so many of us trying to target a weight to maintain can't and ultimately goes back on. https://www.ncbi.nlm.nih.gov/pubmed/20935667
Bottom line. We as humans can't diet. We must choose lifestyles which combine interests with food as fuel to support activities toward interests.