As people grow older, the body naturally goes through many changes—some obvious, others far more subtle. While aging is often associated with wisdom and life experience, it can also bring physical shifts that are talked about less openly. One of these is a distinct body odor that some people notice with age. Although the common phrase used to describe it can sound harsh, the underlying phenomenon is real and has been examined scientifically. Importantly, this scent is not a sign of poor hygiene or lack of self-care. It is typically the result of normal biological processes that become more common over time. Understanding the cause can help replace embarrassment or judgment with awareness and empathy.
Scientists have linked this age-related scent primarily to a naturally occurring compound called 2-nonenal. As the body ages, hormonal changes can lead the skin to produce more fatty acids. At the same time, the body’s antioxidant defenses often decline. When these fatty acids undergo oxidation, they can form 2-nonenal—a compound known for a slightly musty or oily odor that may linger on skin and clothing even after routine washing. It tends to be released more from areas such as the chest and back, and it can become more noticeable in enclosed environments or on fabrics that are not washed frequently.
Certain lifestyle and environmental factors can make the scent stronger. Dehydration, for instance, can affect skin health and contribute to more noticeable body odor. Illness, medications, and reduced mobility may also influence metabolism and skin chemistry in ways that intensify the smell. Research indicates that 2-nonenal can cling to clothing, which is one reason consistent laundering matters. Some researchers have also suggested that humans may subconsciously detect age-related scents as part of an instinctive ability to sense age or health—something seen across many animal species. In Japan, the phenomenon is widely recognized and even has a specific name, which has contributed to the development of products intended to help neutralize the odor.
While specialized soaps, body washes, and natural ingredients such as persimmon extract may help, everyday habits can also make a meaningful difference. Staying physically active supports metabolism and hormonal balance, while a diet rich in antioxidants—along with adequate water intake—can help protect the skin from oxidation. Fresh air and good ventilation can reduce lingering odors in living spaces as well. Above all, it’s important to remember that aging is natural and unavoidable. Approaching these changes with compassion, respect, and understanding helps ensure older adults are supported with dignity. Knowledge not only makes physical changes easier to manage, but also reinforces kindness—something that never goes out of style at any age.
