I saw an interview[0] last week where the guest recommended biltong, or leaving bread to go slightly stale before serving it.

He also goes into some research on the effects that our diet changes are having on short-sightedness; slightly rambly, but very interesting interview.

[0]: https://www.instagram.com/p/CAm7u5UAv1K/ - don't mind the venue, it's just a comedian interviewing interesting people