You pretend to buy the best vitamins - but a vitamin is just a vitamin...? No, error. A vitamin is not just a vitamin. The price of an individual vitamin may vary ten fold according to its specification and origin and the individual unit purchase price of a vitamin may vary from 1 to 180'000. TWYDIL® purchases and will always purchase only the best quality of vitamins and we will never leave out certain vitamins necessary to the horses by the only reason of high price.