An example they use is eggs: Pan-fried eggs are listed as high in AGEs, whereas scrambled eggs aren't. Admittedly my diet isn't the best, but I wouldn't have expected a meaningful difference between ordering my eggs scrambled vs sunnyside-up.

Or for meat, stewed meat would be healthier than roasted meat.

I'm suddenly curious about coffee, now that they mention it...

Ain't greater modern cargo cult than "healthy food".