Comment by arcticbull

Also, I haven't really found anything that says losing fat faster than 2 pounds per week (and realistically it's not possible to lose more than like ~2500kcal/day * 7 = 5 lbs per week even when 100% fasted) is actually unhealthy. Studies show it does not make it any more or less likely that you'll regain weight if you do it fast vs slow. Folks say this but I'm not sure why...

This study says you may get a better body composition if you do it slowly, but also resistance training during weight loss helps prevent 93% of muscle mass loss. [1, 2]

This study says fast loss means more loss, and is actually better for long-term maintenance. [3]

Due to the risk profile of obesity, and this is not medical advice, I think there's a lot of room to take more risk if it helps get you back to a normal weight. The consequences of not are just too high.

[1] https://pmc.ncbi.nlm.nih.gov/articles/PMC5702468/

[2] https://pmc.ncbi.nlm.nih.gov/articles/PMC5946208/

[3] https://pmc.ncbi.nlm.nih.gov/articles/PMC3780395/