Beer and water used to cook a potato...
From Germany's oldest man dies, despite unusual drinking regimen - Yahoo! UK & Ireland News:
"Germany's oldest man, who has died aged 111, said that a little sweetened beer and the potato cooking water most people throw out were the secret of his longevity, family members said.
Hermann Doernemann passed away on Wednesday at a clinic in Duesseldorf, western Germany from the effects of pneumonia, some three months short of his 112 birthday, on May 27.
Doernemann had long been considered the world's oldest man by the Guinness Book of World Records until a Puerto Rican man aged 113 surfaced."