“The impact of [low-light therapy] on sexual health is an emerging field, but I see its potential to improve sexual function and libido with recent studies,” Hamblin says. “It has been shown to improve sperm function and may have applications in increasing fertility in both men and women.”
Research on sexual health applications of red-light therapy is relatively minimal in men, and basically nonexistent for women. A few studies in animals suggest red light therapy might influence LEYDIG CELLS — the body’s sperm producers, which live in the testicles. Another study in humans suggests red light therapy can increase testosterone levels and sexual satisfaction.