You take one 5000 I.U pill, twice daily. With a lot of his remedies on the candida protocol, he sends you detailed product usage instructions with your order, so you never have to wonder. I don't know about the other products on his website. I don't plan on taking it after I am done with the protocol, but I have definitely noticed that I feel better since taking it. The first night I took it, it felt like electricity, all this energy in my body, almost weird. Haven't felt that since and feel SO much better now, I would definitely recommend.