Helps with stamina, and in producing semen count. No harsh side effects.Was skeptical of this product but other reviews promoted my trying it and I'm glad I did! Has provided much needed energy boost as well as much desired size and performance boost. A full half inch in girth and over one inch in length. Can recommend without reservation. Suggest regular use over several months for best results. No adverse side effects an added bonus!Working well and I’m sure helps others better.