6. Portuguese urine gargle
When Marc Antony wooed Cleopatra, when Julius Caesar made a speech, when Ben Hur rode his mighty chariot, they all participated in a sacred ritual that continues today — they gargled.
While that hardly deserves a mention, bear in mind, they weren’t swishing Scope or Listerine. To improve the color of their teeth and freshen their breath, Romans imported and swilled Portuguese urine. Apparently, the Portuguese pH was much more divine and manly than mellow Roman yellow.
While obviously unpleasant, urine contains several compounds like ammonia and urea that actually kill germs and help fight the gum disease gingivitis. No price listed.