Optimise herd health, production and fertility. Save substantial time and money. Marks-Min® is the win-win cattle producers have been looking for. It combines copper, selenium, zinc, manganese and B12 in one convenient, easily absorbed injection. At critical times like calving, mating and drying off, it can provide a vital health and production boost in half the time with the benefits of both B12 and trace minerals in a single injection.