What causes senior body odor? Chemical compound 2-nonenal

The distinctive body odor of older people results not from poor hygiene but from biochemical processes in the skin. Japanese chemist Dr. Shinichiro Haze demonstrated in a study with 22 volunteers that the compound 2-nonenal appears only in people over 40 and its concentration increases with age. It forms from oxidation of unsaturated fatty acids in sebum through oxygen and UV radiation. The intensity of the odor can be reduced through an antioxidant-rich diet, avoiding nicotine, and using appropriate skincare products.

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