He needs to do this: Move more, eat less. That is the key. Only eat when you are SO hungry, you would eat ANYTHING in your refrigerator, and I mean even that old jar of olives of mustard on a piece of bread. And drink lots of water, and get out and move - walk. It works. Also, cut down on sugars.
I was 380, and I'm 5'11. But HE has to do it. Somehow, he has to adjust his mind to WANT to do it, otherwise, it won't work. I was 216 when I weighed in this morning.