How Does Prime Vigor XL Work? The supplement works by targeting the root causes of male performance issues, such as poor blood circulation, hormonal imbalances, and low energy levels. Its unique formula promotes the production of nitric oxide, a compound that relaxes blood vessels and improves blood flow to the penile region. This enhanced circulation leads to stronger, longer-lasting erections. Additionally, Prime Vigor XL supports testosterone production, the hormone responsible for male sexual health, muscle growth, and energy. By balancing hormones and improving blood flow, the supplement helps men achieve peak performance both in and out of the bedroom.