Tea and Coffee Linked to Lower MRSA Infection Risk

If you’ve ever worried about picking up a dangerous bacterial infection—especially one that resists common antibiotics—you’re not alone. MRSA, or methicillin-resistant Staphylococcus aureus, is a notorious ‘superbug’ that’s tough to treat and can spread quietly, often living harmlessly in people’s noses or on their skin. But what if something as simple as your daily cup could make a difference?

Yes, according to a U.S. study, people who regularly drink hot tea or coffee are about 50% less likely to carry MRSA in their noses compared to those who don’t. That’s a significant drop in risk for a habit many already enjoy daily.

What Is MRSA and Why Does It Matter?

MRSA is a strain of the common Staphylococcus aureus bacteria that has developed resistance to methicillin and other beta-lactam antibiotics, including penicillin. Originally controlled by penicillin after its introduction, the bacteria evolved to produce enzymes called penicillinases that break down the drug’s beta-lactam ring, rendering it ineffective. MRSA was first identified by British researcher Jevons and has since become a major cause of hospital-acquired infections worldwide, known for its high toxicity and resistance profile.

The Study: Tea, Coffee, and MRSA Carriage

Researchers at the University of South Carolina, led by principal investigator Eric Matheson, analyzed data from a government survey of over 5,500 Americans. They found that individuals who regularly consumed hot tea or coffee had roughly half the likelihood of harboring MRSA in their nasal passages compared to non-drinkers. While around 1% of the general U.S. population carries MRSA without symptoms, this study suggests your morning brew might lower your personal risk.

The exact mechanism remains unclear, but the research team noted prior evidence that topical or inhaled tea extracts can inhibit MRSA to some degree, both in lab settings and on human skin. Compounds in both tea and coffee appear to exhibit mild antibacterial properties, though the study did not establish a direct causal link. “Our findings suggest a promising, safer, more affordable, and easier way to combat MRSA,” Matheson said. However, researchers cautioned that the protective effect hasn’t been proven, and they don’t yet recommend drinking tea or coffee specifically to prevent MRSA.

What We Know—and What We Don’t

The study highlighted that regular consumption of hot tea or coffee correlates with a roughly 50% reduction in nasal MRSA carriage. Yet, the scientists emphasized that correlation does not equal causation. While lab and human studies have shown that compounds in tea and coffee can inhibit MRSA to some extent, the exact compounds, dosages, or mechanisms remain unidentified. The research did not explore whether drinking these beverages reduces active MRSA infections or prevents their spread, only that carriers are less common among habitual drinkers.

“While our results are intriguing and point to a new avenue for MRSA prevention, we still don’t know why this happens,” Matheson added. The team stopped short of advising people to start drinking tea or coffee to avoid MRSA, given the unresolved mechanisms behind the observed effect.

Frequently Asked Questions

Does drinking tea or coffee actually prevent MRSA infections?

The study found that regular drinkers of hot tea or coffee are about 50% less likely to carry MRSA in their noses, but it didn’t prove that these drinks prevent infection. The lower carriage rate doesn’t necessarily mean fewer infections, just fewer people hosting the bacteria asymptomatically.

How much tea or coffee do you need to drink to see this effect?

The research didn’t specify exact amounts or frequencies, only that “regular” consumption was linked to a lower MRSA carriage rate. The study analyzed general habits among over 5,500 Americans but didn’t measure precise intake levels.

Could other factors explain the lower MRSA rates in tea and coffee drinkers?

Possibly. The study showed a correlation, not causation. Other lifestyle or dietary habits of tea and coffee drinkers might contribute to the reduced MRSA carriage, and researchers haven’t isolated tea or coffee as the definitive cause.

Does this apply to iced coffee or cold brew as well?

The study focused specifically on hot tea and hot coffee. It didn’t include iced beverages or cold brew, so there’s no data on whether those have the same potential effect on MRSA carriage.

Why would tea or coffee compounds affect MRSA?

Previous lab studies suggest that certain compounds in tea and coffee can inhibit MRSA to some degree, both when applied topically or inhaled. However, the exact compounds, concentrations, or mechanisms involved remain unknown and were not detailed in this research.

Should I start drinking tea or coffee to avoid MRSA?

Researchers don’t recommend changing your habits based on this study alone. While the findings are promising, the mechanism isn’t understood, and more targeted research is needed before making any health advice based on beverage consumption.

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