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Do humans smell worse as they age? The science behind nonenal

A 2001 study published in the *Journal of Investigative Dermatology* first isolated the chemical compound 2-nonenal, which is linked to a distinctive and sometimes musty body odor associated with aging. This odor is a result of natural physiological changes and isn't necessarily worse than other life-stage scents, but it is different, and it's a common factor when asking, 'Do humans smell worse as they age?'.