Dr. Joseph Mercola - Take Control of Your Health Overlooked Role of Smell in Physical, Mental, and Social Well-Being
Feb 7, 2026
06:43
- About 22% of adults have some degree of smell loss, and this sensory change often appears years before serious problems like memory decline, heart disease, or reduced longevity become obvious
- Loss of smell is linked to higher risks of depression, social isolation, poor diet quality, and everyday safety hazards such as gas exposure and spoiled food, directly affecting independence and quality of life
- Smell dysfunction often shows up early in neurodegenerative disease, which makes changes in your sense of smell an important early signal rather than a harmless part of aging
- Simple actions such as regular smell checks, targeted smell training, and improving breathing and sleep patterns support the same brain systems affected when smell declines
- Treating smell health like vision or hearing and pushing for routine screening helps identify hidden health risks earlier, when there is still time to take meaningful action