Several studies have indicated that low doses of red light cause an increase in sperm motility and overall fertilizing potential in several species. By increasing sperm swimming speed in vitro, the likelihood of contact with the oocyte is increased.

I researched many red light therapy home devices on the market, but Joovv has been proven to be the most powerful light therapy on the market, delivering the most total energy to your cells to provide optimal results at a short period of time.

The researchers found that irradiating the top of the penis for five minutes with an infrared laser enables it to re-gain the ability to have spontaneous erections. After two weeks of this treatment all 24 male patients in a trial were able to get erections and some even increased the length of their penis.

In the red light therapy group, the authors noted “an increase in muscle activity” and “a significant increase in the time before fatigue was observed.” Researchers determined light therapy “can be used as a clinical tool to increase muscle activity and to prevent fatigue .”

Scant research exists showing a relationship between red light and increased testosterone. Some animal studies have found an increase in testosterone after using low-level laser therapy.

As shown in clinical trials and by numerous scientists, red light therapy naturally increases testosterone.