Hi Paulette, I use it by the drop on Mon Wed and Friday or Tues and Thurs. If
I am under stress I use 1 drop per day. The drop increment is based on Dr. Jarvis'
formula of 1 drop per 150 lb's of body weight. I am not an expert on this topic by any means. What I know and understand about the usefulness of Iodine comes from Dr. Jarvis and his 93 year old daughter, Sylvia.