That will greatly depend on what other fermented foods you are having. Consuming 4oz once or twice a day is a great goal. We prefer to drink right before bed, and sometimes upon waking or 10-15 mins before dinner. There have been times we crave more and drink a whole glass, but for the most part we try to include a variety of fermented foods and beverages throughout the day. For more detailed information to decide how much you should have per day, click here.