That's unfortunately a major, yuge part of the problem, the food you eat. You can take whatever medication to "treat" a disease or disorder that can be lessened/fixed with food, but if you keep eating shitty food, it will never go away.

I sometimes watch video of people making small homes/shelters, sometimes with power tools, sometimes with hand tools only, and even a few that bring nothing and make everything.

https://www.youtube.com/watch?v=zNOgrlsuMHU - this guy made a hell of a lot by himself. House, lake, running water, pond for fish, even a water wheel.