In this article, we will discuss this sexual health supplement and see if it's really worth your time and provides you with better and enhanced sexual health. A. Weak erections affect not only men, but their partners as well. L-arginine, which is converted into nitric dioxide, helps to relax blood vessel and improve blood circulation throughout the body. It is a hormone responsible for feelings of love and trust. They enrolled nearly 200 men in the study, all of whom had low testosterone levels (less than 300 nanograms per deciliter) and mild to moderate symptoms of erectile dysfunction. These include damage caused by UV rays, tobacco, and various foods. Citrulline increased blood flow to the penis in a small clinical study. L-proline can also improve cardiovascular health which is essential for overall sexual well-being. Men taking the lowest dose of lysine had no change in their sexual activity. It is also required for the production collagen, a protein which helps to maintain the health of the skin, bones and joints. Several studies have been conducted on vitamin K2 supplementation and its effects on male energy, function, and performance.