Biohacker Bryan Johnson claims ice packs boost male fertility: Does science agree?

Bryan Johnson, a longevity influencer, claims that icing his testicles greatly increases his sperm count. His unique approach has inspired several Redditors to experiment with this method for improving fertility. Although some research hints at the benefits of mild scrotal cooling for male fertility, experts caution that there is insufficient evidence to suggest significant improvements in testosterone or overall sperm production.