I heard that certain sodas, like Mountain Dew, can reduce sperm count — is there any truth to this?
– Rex*

No scientific proof exists that Mountain Dew — or any other soda, for that matter — has any effect on sperm count. These rumors have been around for years.

Many people have heard this urban legend, but it doesn't mean Mountain Dew can be used as some kind of male birth control. Drinking a lot of Mountain Dew will only give you too much caffeine, a huge intake of empty calories, and lots of urine.

If you're going to have sex of any kind, always remember to use a condom to prevent STDs and pregnancy. Nothing helps reduce the number of sperm escaping as well as a good rubber.

For more information, check out these articles:
About Birth Control: What You Need to Know
About Sexually Transmitted Diseases (STDs)
Caffeine
Male Reproductive System
Talking to Your Partner About Condoms

Reviewed by: Larissa Hirsch, MD
Date reviewed: January 2008

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Although we can't reply personally, you may see your question posted to this page in the future. If you're looking for medical advice, a diagnosis, or treatment, consult your doctor or other qualified medical professional. If this is an emergency, contact emergency services in your area.

*Names have been changed to protect user privacy.