There is no recommended dose without knowing your current blood levels. Get yourself tested - if you're severely deficient start taking large doses (3000IU - 5

There is no recommended dose without knowing your current blood levels. Get yourself tested - if you're severely deficient start taking large doses (3000IU - 5000IU or more) for a few weeks, get yourself tested again and then adjust. If you're not deficient just keep doing what you're doing.