D, the precleanse kit contains 2 16 oz bottles, enough for 30 days at 2 tablespoon each day. Then it's one tablespoon per week for life. I had more parasites then this took care of, so I'm hitting it at 1 tablespoon a night, 6 days a week again. This time I've passed tapeworm segments and 1 HUGE liver fluke. I haven't seen what I referred to as eggs in a long long time but when they came, they came fast and furious. Dewomer works, just take the stuff. MH says he has family members that come over and drink a quart in a day ... can't imagine, it's like drinking syrup!