Prosperm® Plus is a unique, feed supplement from JSR Genetics that helps to maximize the concentration and quality of boar semen. Thoroughly researched, and successfully used to enhance the performance of our renowned JSR stud boars, this convenient daily supplement contains Hi-DHA oil, Selenium and Vitamin E. Together, these completely natural substances enhance the development of the boar’s sperm to such an effect that, from now on, AI users wanting optimum efficacy and fertility should always specify semen from boars fed with Prosperm Plus.