The dosage really depends on how strong the tincture is, and what you're using it for. If you're just using the astragalus for maintaining health and balance the dose will be really small. If you're using it to try to heal an existing problem, like say for example an autoimmune issue, the dose will be larger. It also depends on your constitution--some people are very sensitivie and don't need a lot, whereas others need a lot to get effects. I would suggest starting out with a smaller dose, maybe 1/2 a dropper, and increasing day by day until you start feeling clear headed, fresh, and energetic--that'll be the astragalus. Good luck!