I have lived in Kenya most of my life so am delighted to have found a natural alternative to help prevent malaria, with no side effects. I use if for the whole family when we go to a malarial area. We do take other precautions such as insect deterants on the skin, long sleeved shirts and use mosquito nets at night, but as yet we have not contracted malaria since we have been taking Demal 200. It is pleasant & easy to use. Your delivery service is very efficient and prompt. Thank you