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WHY DO MEN have bigger noses than women?

Maybe you’re not shocked that, in general, men have larger noses than their female counterparts?

A study last year confirmed what might be an assumption made by many. Researchers found that at the same body size, male noses are 10% larger than female noses, on average.

That means, for a woman and a man of the same size, the man still has a bigger nose. So why is that?

According to researchers, men have more lean muscle mass than women, which requires more oxygen for building and maintenance. Bigger noses can take in more oxygen.

Researchers previously suggested that nose size is influenced by body mass, an indication of different oxygen demands required for tissue maintenance. This is first long-term study to look at how nose size varies between men and women in relation to body size, and to determine when those physical differences begin to appear.

Top left: a boy’s skull and nose pre-puberty; top right: a girl’s skull and nose pre-puberty; bottom left: adult male skull and nose; bottom right: an adult female skull and nose.

The study, published last November in the Journal of Physical Anthropology, observed the facial changes of 38 individuals (20 males and 18 females) of European descent from age 3 to their mid-twenties.

Even at the same body size, researchers found that male noses grow disproportionately larger than female noses around age 11. (The researchers used sitting height and trunk-frame size — calculated as the product of sitting height and pelvic bone width — as their two measures of body size).

The finding makes sense. The changes take off at the starting age of puberty, when males begin to grow more oxygen-hungry lean muscle mass, while females grow more body fat mass.

“During this period, approximately 95% of body weight gain in males is due to increased fat-free mass compared to 85% in females,” the study says.

A large nose means more oxygen can be breathed in and transported in the blood to supply these oxygen-hungry muscles, researchers explained in a statement from the University of Iowa.

The research shows that nose size is tightly linked to the demands of the respiratory system, rather than other features of the facial skeleton.

According to the study, this may also explain why modern human noses are smaller than those of our ancestors, like Neanderthals, who probably needed more oxygen to maintain their higher levels of muscle mass.

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