If you seem to attract mosquitoes more than others, science has started to explain why. Multiple studies point to the way people breathe and smell, their body heat, and even what they drink as factors that make certain people more appealing to mosquitoes.
What draws mosquitoes
– Carbon dioxide: Mosquitoes detect and follow the CO2 plume that people exhale. That initial long-range cue helps them home in on a potential host.
– Body heat and movement: Stronger heat signatures and movement can help a mosquito decide whether to land and feed once it’s close.
– Skin chemistry: People who get bitten more often tend to produce higher levels of certain skin compounds, especially carboxylic acids. These acids are present in sweat and are generated by skin microbes; they influence how attractive someone’s skin smells to mosquitoes.
– Alcohol and beer: A recent field study at a music festival observed that people who had consumed beer were more likely to attract mosquitoes. The investigators suggested the beer’s scent on skin might be the cause rather than blood alcohol levels, but they emphasized the result is preliminary and needs confirmation.
Why this matters
Mosquitoes are more than a nuisance: they transmit serious diseases such as malaria, yellow fever, Zika, dengue and chikungunya. Understanding what attracts them could improve prevention strategies and lead to better, more targeted repellents.
DEET and mosquito learning
DEET has long been one of the most effective mosquito repellents. However, laboratory research shows that insect behavior can be flexible. In a controlled experiment, researchers trained mosquitoes by pairing the smell of DEET with an attractive food source (warm blood kept just out of reach). After several training sessions, a majority of those mosquitoes began to approach the smell of DEET alone, and trained insects preferred a DEET-covered hand over an untreated one.
Investigators say this demonstrates that mosquitoes can learn to change their response to a chemical cue: what smells repellent to an untrained insect can become associated with food after repeated experience. The authors called this a potential paradigm shift in how we think repellents work, because learned experience can override chemical deterrence.
Caveats and practical advice
Experts note important caveats: the “DEET-learning” results came from a specific laboratory conditioning setup and may be unlikely to occur exactly that way in nature. The findings do not mean people should stop using DEET—repellents still reduce biting risk and disease transmission. Researchers who did the work suggested that application timing and concentration could matter; reapplying more frequently rather than applying one large dose at once may help maintain continuous protection.
How to reduce your risk of bites
Simple, proven steps can lower your chance of being bitten:
– Use an effective repellent (DEET, picaridin, IR3535 or oil of lemon eucalyptus formulations where appropriate) and follow label instructions on reapplication.
– Wear long sleeves and long pants when mosquitoes are active.
– Choose light-colored clothing, which is less attractive to some species.
– Avoid being outside at dawn and dusk when many mosquitoes are most active.
– Eliminate standing water around your home (flowerpots, buckets, toys), since these are breeding sites.
Bottom line
Mosquito attraction is shaped by multiple signals: exhaled CO2, body heat, skin odors produced in part by microbes, and possibly scents from substances like beer. While laboratory research shows mosquitoes can learn to change their response to repellents like DEET, repellents remain a key tool for protection. Combining repellents with physical barriers and environmental control gives the best practical defense against bites and mosquito-borne illness.
