What Causes 'Old People Smell'?

The video explains the distinctive smell associated with older people, often described as grassy or greasy, which is caused by the chemical non enal. This odor becomes more pronounced with age due to changes in skin chemistry, including reduced antioxidants and altered fat secretion. Non enal is not water-soluble, making it difficult to wash off completely. While commercial soaps can help, they don't fully remove non enal. The perception of this smell varies culturally and personally, and it is a normal part of aging, often seen as a sign of experience and survival.

Why is non enal difficult to remove from the skin?

What cultural factors might influence how people perceive the smell of aging?