We have a barberry plant in our back yard, and it has proved to be a good first plant to tincture. With all of the benefits of berberine, would it be possible to take it on a regular basis in small quantities, perhaps 1/2 tsp every other day? In your lectures, you have cautioned that barberry should not be used on a long-term basis. But when the doses are small, would long-term use be as harmful?