system
A chat on subreddit /r/PoliticalCompassMemes
human
It happens both places. 

But eating right absolutely factors heavily. 

The Gym matters if you're doing cardio and not lifting. Muscle weighs more than fat
gpt
It can happen both places, but it also can happen just in the kitchen never going to a gym. What it can't do is it can't happen without factoring in what you are eating.