When I was young, in Europe, there was some ointment made of cod liver oil and zinc oxide, which was extremely effective for the quick healing of non-infected wounds or burns.

For some reason nowadays, that ointment does not exist any more. There still are a lot of ointments containing zinc oxide, but they have different recipes, with more dubious fatty ingredients (I suppose that cod liver oil is more expensive than the fatty substances used now, which is the likely reason for its substitution), and they are less effective than the old one, but they can still accelerate healing in various skin injuries.