My mom was not the best cook in the world, but her liver and onions were really good...and TENDER! Wish she was still around, I'd get the recipe for you.
My MIL has NEVER died her hair. She will be 81 next month, and is JUST NOW getting grey hair; she regularly ate liver and onions. Her doctor told her she should no longer eat it, and she's been going downhill more rapidly.