Why do mosquitoes seem to prefer you?

Explore genetic variants linked to mosquito attraction and how strong bite reactions tend to get.

Mosquitoes hunt by scent, carbon dioxide and warmth — and how your skin 'smells' is partly shaped by genes. Twin studies have shown that mosquito attractiveness is heritable, and separate variants affect how strongly your body reacts to the bites.

What the analysis shows

Some people come home from a summer evening without a single bite; others look like they were the buffet. Part of the difference is genetic: variants have been linked both to how attractive we seem to mosquitoes and to how strong the swelling and itch become. DNAHelper shows which of these variants your raw file carries — a statistical association, not a summer fate. The analysis runs entirely locally.

Three tracks: attraction, swelling and itch

The research points to three separate tracks: variants linked to perceived attractiveness to mosquitoes, variants linked to bite-reaction size, and variants linked to itch intensity. DNAHelper scores them separately so you can see which part stands out in your data.

What the twin studies found

Twin studies found identical twins more alike in mosquito attractiveness than fraternal twins — classic heritability evidence. Reaction strength shows similar patterns. The effect sizes are modest though — scent, clothing and location matter a lot.

Pregnancy, sweat and dark clothing play in

Pregnancy, beer, exercise sweat and dark clothing all make you more visible to mosquitoes regardless of genetics. A quiet result does not make you immune — and an 'attractive' result does not ruin summer.

What the result means — and does not mean

The analysis builds on the trait perceived unattractiveness to mosquitos measurement, mosquito bite reaction size measurement and mosquito bite reaction itch intensity measurement (moderate evidence strength). The associations are moderate in strength and partly built on self-reporting. Fun and true as statistics — but repellent is still your best weapon.

Associations are statistical — they describe populations, not destinies. Read how we grade evidence in our method.

Privacy: your file never leaves the browser

You choose your raw file locally — it is parsed and analysed entirely in your browser and is not uploaded for the standard analysis. The only exception is the optional DNA Chat feature where you, after explicit consent, can share selected variants. Read the privacy policy · What happens to your DNA file?

Compatible raw files

Works with raw data exports from MyHeritage, 23andMe, AncestryDNA, FamilyTreeDNA (.txt, .csv, .zip). The download guides show exactly where to find your file with each provider — and the file formats are explained here.

Check your mosquito genetics