The aging aroma: why our scent changes with time
As people age, changes in skin lipids cause more of the chemical 2-nonenal to form when oils oxidize, creating a perceptible scent often labeled as 'old person smell.' The amount varies by genetics, skin microbiome, hygiene, and environment, and it appears gradually rather than suddenly (some data show emergence around age 40). Studies even suggest the odor is not necessarily unpleasant, and while you can reduce its presence with regular washing and by minimizing oxidative stress through diet, there is no guaranteed way to stop it, and no strong evidence that specialized products dramatically neutralize it.
