We have been using Demal200 for about 4 years now and have really appreciated its benefits. It was recommended to us by another NTM family on our field. We also currently promote it to others as well noting that no one in our family has gotten malaria while on Demal. We have used it as a treatment for malaria symptoms which went away within hours and we have not ever had to test to see if we have had malaria. We appreciate this product very much and will continue to use it!!