Considered the major "antioxidant group," these three vitamins are found in 10-fold higher doses in semen than blood. They are work-horses in controlling what’s called “oxidative stress” in sperm. Sperm are unique in that they are a small, high energy cell that move rapidly, which is very unique in the body. Due to their compact design, the sperm engines (mitochondria) are located right next to the passenger compartment, the delicate DNA payload. The free radicals that are generated from the energy of sperm movement are sources of “oxidative stress” and can easily damage the DNA payload, and result in infertility. Antioxidants vitamins A, C and E are great at absorbing the radical oxygen species and free radicals that are generated in sperm and that have been implicated to underlie as much as 25% of male infertility.