Destroys the “Nonenal” Chemical That Causes Old Person Smell
From around forty, the oils your skin has always made oxidise more readily than they used to. That reaction makes a compound called 2-nonenal — the one behind what people call “old person smell”.
It was identified in human body odour, and reported to increase with age, by Haze and colleagues in the Journal of Investigative Dermatology in 2001.
Ordinary soap does not break it down. Deodorant covers it for a few hours.
Persimmon tannins bind to the nonenal instead of masking it — which is why the bar works on the cause and not on the smell.