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Circulation 2010;122(15):152044 [Accessed October 6, 2020] Centers for Disease Control and Prevention

For reference, listed below are some examples of the average amounts of caffeine in different beverages: Percolated Coffee ~100/cup 8 cups Drip Coffee ~145mg/cup 5 cups Espresso Coffee ~100mg/cup 8 cups Tea ~50mg/cup 16 cups Coke ~35mg/12oz can 23 cans Mountain Dew ~54mg/12oz can 15 cans Red Bull ~80mg/8.5oz can 10 cans Conclusion: As long as caffeine intake does not exceed 800mg/day, then it will probably not have a significant negative impact on male fertility