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Why does my dad smell musty? Unpacking the causes of elderly odor

According to research published in the *Journal of Investigative Dermatology*, a distinct body odor compound called 2-nonenal increases after age 40 due to skin chemistry changes. For many families, this raises a sensitive question: **Why does my dad smell musty?** The answer lies in a combination of biological changes and other health and lifestyle factors that influence body odor in older adults.