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Member Research & Reports

Member Research & Reports

BU: Men’s Consumption of Caffeinated Sodas, Energy Drinks Linked to Reduced Chances of Pregnancy

Caffeine intake by men — specifically from soda and energy drinks — may reduce the chances of pregnancy, a new study led by Boston University School of Public Health (BUSPH) researchers shows.

The study, in the journal Reproductive Toxicology, found that female caffeine intake had no appreciable effect on fecundability, or the probability of a couple achieving a pregnancy. But higher consumption of caffeine (≥300mg/day) by males was associated with slightly reduced fecundability, in a sample of more than 600 men who were in couples trying to get pregnant. The association appeared to be driven mainly by consumption of caffeinated sodas and energy drinks.

“To our knowledge, no other study has examined the association between energy drink consumption and fecundability,” said Ms. Amelia Wesselink, lead author of the study and a BUSPH doctoral candidate in epidemiology. “We found little association between female energy drink consumption and fecundability, but a 54 percent reduction in fecundability among males who consumed one or more energy drinks per day.”

Because the study was based on a relatively “small number of men who consumed energy drinks on a daily basis,” she added, “this finding should be replicated” in a larger study.

To read more about the study, go to: