Men who took 85 to 170 milligrams of caffeine a day (two to three cups of coffee) were 42% less likely to have erectile dysfunction.
The Harvard researchers credit carrot carotenoids, potent antioxidants that help create vitamin A.
Over 10 servings of tomatoes per week reduce prostate cancer risk by 18% in men.
Quercetin, found in spicy serrano peppers, boosts testosterone levels by lowering kidney excretion.
Pumpkin seeds are one of the best sources of zinc and magnesium, which enhance testosterone and growth factor hormone when combined.
The delicious fruit may treat erectile dysfunction naturally, according to study.