What Happens to Taste and Smell as We Age?

More than 75% of people over the age of 80 years have evidence of major olfactory impairment, profoundly altering their daily experience of food, according to PMC. This widespread, often unnoticed sensory loss silently sabotages nutritional intake and overall health, creating a critical and unrecognized public health challenge for many older adults. The ability to detect aromas is crucial for food enjoyment, and its decline often leads to a reduced desire to eat.

Sensory decline is a normal part of aging, but its significant impact on nutrition and overall health is often underestimated by individuals and caregivers. This underestimation creates a tension between the natural physiological changes of aging and the critical need for adequate nutrition in later life. Many believe that diminished senses are merely an inconvenience, rather than a predictor of broader health challenges.

A proactive approach to dietary management and regular sensory health checks will become increasingly crucial for maintaining quality of life and preventing malnutrition in an aging population. Understanding the mechanisms and consequences of these changes allows for targeted interventions. This article explores how taste and smell change with age, affecting food preferences and nutritional status, particularly as we approach 2024.

The Silent Shift: How Taste and Smell Diminish with Age

In older adults, 70% experienced hyposmia, a reduced ability to smell, while 53.3% had hypogeusia, a reduced ability to taste, according to a study published in Nature. This contrasts sharply with younger adults, where only 16.7% were hyposmic and 6.7% were hypogeusic, highlighting a significant age-related shift in sensory perception. While both senses decline, olfaction—the sense of smell—is often more profoundly affected.

Olfaction notably declines considerably after the seventh decade, as detailed by PMC. The sense of smell begins to wane earlier and more severely than taste for many individuals. Taste disorders are far less prevalent than olfactory losses with age, suggesting that the primary driver of food-related sensory loss is overwhelmingly smell, not taste. The nuanced interplay between these senses means that even minor taste decline, combined with major olfactory impairment, can significantly diminish the overall pleasure and nutritional guidance derived from eating.