I was thinking along the lines of avocado or grapeseed oil. Not like canola or Crisco (unless you want to get freaky naughty). The non-solvent extracted oils (cold-pressed) to be exact should be good externally. Yes it goes on you, but is not processed by the liver.
Crisco, if you want to swim the English Channel, like Gertrue Ederle.
She was the first woman to swim the English Channel, way back in 1926.