Why Do Some People Get Bitten by Mosquitoes More Than Others?

Have you ever enjoyed a warm summer evening outdoors, only to find yourself covered in itchy mosquito bites — while your friends remain untouched? You’re not alone. Many people wonder why mosquitoes seem to have a preference for certain individuals. The truth lies in a fascinating mix of science, biology, and even genetics.

1. Body Chemistry: The Invisible Invitation

Mosquitoes are incredibly sensitive to the chemicals we emit. Each person’s body gives off a unique cocktail of carbon dioxide, lactic acid, uric acid, ammonia, and other substances through sweat and breath. Some people produce more of these attractants, making them more appealing to mosquitoes. For example, people who exercise often produce higher amounts of lactic acid and sweat, both of which draw mosquitoes in like a magnet.

2. Blood Type: A Tasty Preference

Research suggests that mosquitoes are particularly drawn to people with Type O blood. In fact, studies have shown that individuals with Type O are twice as likely to get bitten compared to those with Type A. While we can’t change our blood type, it might explain why some people seem to be mosquito magnets.

3. Body Heat and Metabolism

Mosquitoes are heat-seeking creatures. Individuals with higher body temperatures, faster metabolisms, or pregnant women (who emit more heat and carbon dioxide) often become prime targets. Even wearing dark clothing can absorb more heat, making you more visible to mosquitoes.

4. Skin Microbiota: The Smelly Factor

The bacteria living on your skin also play a role. Different bacterial communities produce different scents, and some of these are more enticing to mosquitoes than others. It’s a subtle but important factor that scientists are still studying.

5. Genetics: Born to Be Bitten?

Surprisingly, genetics may account for up to 85% of your attractiveness to mosquitoes. From your natural body odor to how much carbon dioxide you exhale, your DNA shapes many of the factors mosquitoes use to choose their next meal.

6. Movement and Color

Moving around can catch a mosquito’s attention, and certain colors—like black, navy, or red—make you stand out against the natural landscape. Mosquitoes use vision as well as smell to find their victims.


Protecting Yourself

If you’re one of the unfortunate people mosquitoes seem to love, don’t worry—there are steps you can take:

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