A lot of his other food isn't mentioned. The weight around his neck shows his exercise has definitely slowed down. Lack of exercise is a factor for stroke. That is a long term trend for him. He's definitely slowed down over the years and likely hasn't adjusted his diet. I'd guess he's consuming more bread/sugar than that regular supper implies. Likely some long term dietary deficiencies as well.

At 72(?), though, he's still doing better than plenty of others. Full of flaws and imperfections like everyone else but he's doing his thing and apparently enjoying it, so good for him.

I think you missed the part where he said he eats nothing else except some fruit and sandwiches for lunch?