Carbon dioxide: the number one call

With every breath, we release carbon dioxide (CO₂). Mosquitoes are extremely sensitive to this. The more you emit, the more you are identifiable.
People who are tall, have a larger body mass or move around a lot produce more CO₂. After physical activity, the combination of heat + accelerated breathing becomes a real mosquito magnet.
Body odor, a unique signature
Contrary to popular belief, this has nothing to do with hygiene. Our skin is naturally home to bacteria that produce specific odorous compounds. This invisible "perfume" is unique to each person.
Some chemical combinations are simply more attractive to mosquitoes. It's biological, involuntary... and sometimes frustrating.
Blood type also plays a role
Studies have shown that mosquitoes have preferences depending on blood type. People with type O are, on average, more often bitten than those with type A.
Some people also release chemical markers through the skin that make it easier to recognize their blood type. Here again, there is not much we can do about it.
Sweating and lactic acid
When you sweat, your skin releases lactic acid, a substance that mosquitoes love. Add to that a higher body temperature after sports or a brisk walk, and you have the perfect combo.
It is for this reason that bites seem to multiply after a sports session or a very active day.
The color of your clothes matters
Mosquitoes don't just rely on smell: they also see. They are more attracted to dark colors such as black, navy blue or red, which create a strong contrast.
Conversely, light-coloured clothing reflects light and makes your figure less visible to them. A simple but effective detail.