Why mosquitoes bite some people more than others

It's not just a feeling: some people are indeed more 'preferred' by mosquitoes. Researchers at Case Western Reserve University indicate that the reason lies not in blood type, but in the specific blend of chemicals an individual's body emits through skin and respiration. Gabriella Wolff, a professor in the university's Biology Department, explains that while most people produce the same chemicals, the varying proportions can make one person significantly more attractive to mosquitoes than another.

Aldehydes are among the compounds identified as playing a crucial role. According to Wolff, when these chemicals are present in a certain ratio, they act as a powerful signal that draws mosquitoes. Beyond natural body chemistry, other factors contribute to a person's 'appetite' for mosquitoes. Physical activity increases lactic acid production, and consuming beer or bananas can alter the chemical compounds released through skin and breath. Additionally, colors like red, black, and cyan appear to attract these insects more easily.

Pregnant women may also be more vulnerable due to a higher metabolic rate. However, Wolff emphasizes that there is no solid scientific evidence to support the theory that blood type is the primary reason some individuals are bitten more frequently. She also notes that only female mosquitoes bite humans, as they require blood for egg development, and that these females might adapt their behavior based on past experiences, potentially seeking out individuals with similar scents if a previous feeding was successful.