Body odor in diabetes
Pro Research Analysisby 
Searched over 200M research papers
Body Odor and Diabetes: Olfactory Dysfunction and Odor Changes
Olfactory Dysfunction in Diabetes
Research consistently shows that people with diabetes, especially type 2, often have impaired sense of smell. Studies have found that diabetic patients score lower on smell recognition tests compared to healthy individuals, and this impairment is linked to the duration of diabetes, age, and complications like neuropathy and microalbuminuria 157. These olfactory deficits are not explained by other factors such as age, sex, or lifestyle, but are directly related to diabetes itself 125. The impairment can affect odor detection, identification, and memory, and is associated with changes in brain regions responsible for processing smells 37.
Changes in Body and Breath Odor in Diabetes
Diabetes can alter the composition of volatile organic compounds (VOCs) in breath and body odor. Elevated acetone in the breath is a well-known marker of diabetes, especially when blood sugar is poorly controlled . Non-invasive detection systems and trained glycemic alert dogs can identify these changes in breath odor, which vary with blood glucose levels (euglycemia, hypoglycemia, hyperglycemia) 46. These odor changes are significant enough to be detected by both technology and animals, supporting their use in early diabetes detection and management 46.
Mechanisms Linking Diabetes and Odor Changes
The olfactory system is closely tied to metabolic processes. Diabetes disrupts metabolic homeostasis, which can affect the brain’s olfactory networks and reduce neuroplasticity in areas responsible for smell 237. This disruption not only impairs the ability to detect and recognize odors but may also contribute to cognitive decline seen in diabetes 37. Some diabetes treatments, like DPP-4 inhibitors, may help restore certain aspects of olfactory neuroplasticity, though they do not fully reverse odor detection deficits .
Clinical Implications
Olfactory dysfunction and changes in body or breath odor can serve as early indicators of diabetes and its complications. Monitoring these changes may help in early diagnosis and in tracking disease progression or treatment response 46. Additionally, the link between olfactory impairment and cognitive decline highlights the importance of addressing sensory changes in diabetes care 37.
Conclusion
Diabetes is associated with both impaired sense of smell and detectable changes in body and breath odor. These changes are linked to metabolic disturbances and complications of diabetes, and can be identified using both technological and biological methods. Recognizing and monitoring olfactory dysfunction and odor changes may offer valuable insights for early detection and management of diabetes.
Sources and full results
Most relevant research papers on this topic