What is it?
Zytenz is a male enhancement product that claims in their advertisements that it can help its users have longer, better, and more intense sex. They say that it can improve men’s erections, increase the frequency with which they have intercourse, and improve the volume, concentration, and longevity of men’s sperm.
Their promotional materials also contain testimonials from men saying that they gained as much as an inch in overall size. While they state that overall results may vary, they do imply that many of their users see permanent gains in base penis size.