Many people notice that their skin odor changes as they age. It is sometimes described as a faint musty, slightly dusty scent that can resemble old books or cardboard. Research shows that this is not a myth, but a real biological process associated with age-related changes in the body.
Scientists have determined that the main cause of the characteristic odor is a substance called 2-nonenal, an organic compound from the aldehyde group. Its production increases with age, especially after the age of 40, and a more noticeable accumulation is usually observed after the age of 50. The process is gradual and depends on many factors, including genetics, skin type, lifestyle and environmental influences.
Experts explain that with age, the skin's antioxidant defenses decrease, the composition of sebum changes, and the accumulated exposure to ultraviolet light and other external factors intensifies oxidative processes. Under such conditions, 2-nonenal is formed more actively, which contributes to the appearance of the characteristic odor.
It is important to understand that the intensity of this aroma varies greatly between people. In some it is almost imperceptible, in others it is more pronounced. Researchers emphasize that the perception of smell is also subjective. What seems unpleasant to one person may seem neutral or even pleasant to another.
An interesting phenomenon is olfactory adaptation, the brain's ability to get used to constant smells. This is why people often don't smell their own scent. The brain "filters" familiar smells to better respond to new stimuli.
2-Nonenal is a fatty acid, so it doesn't dissolve well in regular soap and water. It's difficult to completely get rid of it just by washing, because the body continues to produce it. Researchers suggest that products with antioxidants or components that bind aldehydes, such as tannins, may have some effect. However, convincing large-scale clinical studies are still lacking.
Some research has also explored the use of plant extracts to reduce oxidative stress, which contributes to the formation of 2-nonenal. However, experts emphasize that these approaches require further research and cannot be considered a full-fledged treatment.
Scientists urge not to perceive age-related changes in smell as something embarrassing or pathological. It is a natural biochemical feature of skin aging, similar to the appearance of wrinkles or dryness. The perception of smell largely depends on cultural norms and personal experience.
