Scent of a woman: Onion

The team found that the women’s armpit sweat contained relatively high levels of an odourless sulphur-containing compound — 5 milligrams per millilitre of sweat versus 0.5 milligrams in men. When the researchers mixed this compound in the lab with bacteria commonly found in the armpit, the bugs turned it into a thiol – a previously discovered odour from armpits that is akin to onion.

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