New research points to a clear link between type 2 diabetes and hearing loss, one that has received far less attention than other well known diabetes complications. A review of 29 studies covering more than 17,000 participants found that adults with type 2 diabetes are more than twice as likely to experience clinically significant hearing impairment compared to those without the condition.
The numbers behind that finding are notable. Roughly one in four adults with type 2 diabetes has serious hearing impairment, and the risk appears especially pronounced in adults under 60, who were found to be three times more likely to experience moderate to severe hearing issues compared to their peers without the disease.
Why hearing loss has been overlooked in diabetes care
Diabetes has long been associated with complications affecting the eyes, kidneys and nerves, each of which has established screening protocols built into standard care. Hearing health has not received the same treatment. Dr. Mehwish Nisar, lead author of the review published in Diabetes Metabolism Research and Reviews, explained that conditions like retinopathy and neuropathy already have clear screening pathways built into diabetes care, which keeps them prominent in conversations between patients and providers. Hearing loss, by contrast, has never been systematically built into those same protocols, leaving many patients and even some healthcare providers unaware of the connection.
How diabetes may affect hearing
While the review itself did not investigate the specific biological mechanisms at play, earlier research suggests that prolonged high blood glucose levels can damage small blood vessels and delicate structures within the inner ear. That damage tends to affect higher frequency hearing first, and it can progress gradually enough that many people don’t notice the change until it starts interfering with everyday communication.
Signs of hearing loss worth paying attention to
Healthcare professionals are being encouraged to raise hearing health directly with diabetes patients, particularly those under 60 or those who have been diagnosed relatively recently. Early warning signs can include trouble following conversations in noisy settings, frequently needing others to repeat themselves, or gradually turning up the volume on phones, televisions or other devices more than usual. Dr. Nisar noted that simple, low cost hearing tests can catch clinically significant hearing loss early, often before it becomes seriously disabling.
Why routine hearing checks may need to become standard
The review’s authors are calling for hearing assessments to be added to the official Standards of Care for diabetes, joining the eye and kidney screenings that are already routine parts of the disease management. These hearing tests are non invasive and can lead directly to helpful interventions, including hearing aids, which can meaningfully improve quality of life for people affected by hearing loss.
The researchers note that this need is especially urgent for younger adults with diabetes and for patients in low and middle income countries, where access to audiology services tends to be more limited. Their broader message is straightforward, people living with diabetes shouldn’t wait until hearing loss becomes severe before raising the issue with their healthcare team, since earlier conversations about hearing assessments could lead to better long term outcomes.
