Was having acne and whiteheads issues for the last one year, then was introduced to Praventac and Ag Factor by sister who had tried it a few years back. Took the plunge and bought 3 months worth of Praventac and Ag Factor. Been 4 weeks since i took it and my skin has improved. Less ugly outbreaks and whiteheads. Even the pimples have shrunk. Pimples heal faster as well. Happy with the product and will continue to use and recommend to friends amd family.