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  • name of a chemical found in the skin of older people, and used in caregiving as shorthand for a distinctive "old people smell." Discussed in this article.

    Some people refer to it as “old-people smell,” ... often mistakenly attributed to poor hygiene, but it is actually an inescapable component of body odor that only manifests in older individuals. The official (and more respectful) term for the smell is nonenal...

    Found only in participants aged 40 and older, nonenal is a component of body odor that is produced when omega-7 unsaturated fatty acids on the skin are degraded through oxidation.

    April 20, 2019