Sauerkraut juice contain lots of vitamins and minerals - among other things it contains: vitamin C - important antioxidant for the immune system and metabolism, vitamin K - important for healthy bones and blood clotting, potassium and magnesium - important for the heart and muscles. Raw sauerkraut and freshly squeezed sauerkraut juice contain lots of vitamins and minerals - among other things it contains: vitamin C - important antioxidant for the immune system and metabolism, vitamin K - important for healthy bones and blood clotting, potassium and magnesium - important for the heart and muscles.