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As people age, their bodies change in ways we can see — wrinkles, thinning hair, slower movement — but there are also changes we can smell. Many people notice a unique scent in older individuals, often called “old person smell.” While this odor is natural and harmless, it can sometimes feel unpleasant or stubborn. But here’s the surprising truth: in many cases, simply washing one specific area properly can make a huge difference.
Where Does the “Old Person Smell” Come From?
Scientists have identified that a compound called 2-nonenal is one of the main contributors to the smell associated with aging. This compound is produced when skin lipids (fats) oxidize — a process that increases after the age of 40 due to changes in skin regeneration and oil production.
Unlike regular body odor, which comes mostly from sweat and bacteria in the armpits or feet, 2-nonenal tends to collect in areas with more sebaceous (oil) glands. This makes it harder to eliminate with normal soap or body wash.
The Key Area to Wash More Thoroughly
The area where 2-nonenal builds up most? The upper back and around the neck — especially the area between the shoulder blades.
Why there? Because it’s one of the oiliest parts of the body and also one of the hardest to reach. Sweat and skin oils can collect there, especially in older adults who may not scrub that region effectively during bathing.
Over time, this can lead to a buildup of oxidized oils and dead skin, which produces that distinct “old smell.”
How to Properly Wash the Area
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