Ever wonder why mosquitoes seem to feast on you while others walk away bite-free? It’s not just bad luck — mosquitoes actually prefer certain people, and science is beginning to explain why.
In one study published in the Journal of Medical Entomology, researchers found that mosquitoes landed nearly twice as often on people with blood Type O compared to those with Type A. This may be because some individuals secrete chemical markers through their skin that reveal their blood type — an irresistible clue for mosquitoes hunting a meal.
But blood type isn’t the only factor. According to Jonathan F. Day, entomology professor at the University of Florida, mosquitoes are drawn to a combination of cues. One of the strongest is carbon dioxide. People with higher metabolic rates — whether due to genetics, body size, or physical activity — exhale more CO₂, attracting more mosquitoes.
Then come the secondary signals. Lactic acid, which is released through sweat (especially after exercise), is another big draw. Mosquitoes pick this up through receptors in their antennae, signaling that you’re not just a CO₂ source — you’re alive and full of blood.
Appearance matters, too. Mosquitoes use vision to detect contrast, especially near the ground. Dark clothing makes you stand out against the horizon, while lighter colors blend in, making you less visible to the bugs.
Once they land, mosquitoes confirm their choice through tactile cues — meaning if they’re already on you, chances are they’ve done the math.
So if you’re always the one scratching at summer cookouts, you’re not imagining it. You may just be a scientifically verified mosquito magnet.
How to Make Yourself Less Appealing
Wear light-colored, breathable clothing that covers your skin. Stay cool and dry to minimize sweat. Use fans when sitting outdoors — mosquitoes are weak fliers. Burning natural repellents like citronella, lavender, or rosemary can also help mask your scent and keep them at bay.
