Aqua cure that's the one. Can't vouch for it myself.

Okay then figure out who was doing his grocery shopping and fire them. Your mom? Then she is complicit. No more processed crap or pop or alcohol. Have someone else shop for him and make it exciting. Try new recipes or exotic stuff for the pallet. Going on a diet doesn't have to suck. In fact, if he's open minded and not a stubborn old fart then it can be adventurous and a new interest. I've heard some people say good food is better than sex.

Also, don't make it feel like he's alone. If he is cutting out alcohol and pop and processed chemical preserved shit, then don't be drinking that shit in front of him or having that shit in the pantry tempting him. Throw it all out. Don't make him go through it alone. Your mom should change her diet too, not continue to eat the same crap and then expect him to change his habits.

My friend got the jab, got liver cancer, and his significant other just wanted the docs and nurses to take care of him while she continued to eat shit and fill the house with shit. He died and now she's rapidly declining in health eating boxed frozen microwaved goyslop.