Learn How to Recover Your Taste and Smell

Understanding Taste and Smell Loss: What Happens in Your Body

Taste and smell are closely connected senses that work together to help you experience food and detect potential dangers like spoiled food or gas leaks. When you lose these senses, it affects your quality of life in ways that might surprise you. About 1 in 5 Americans experience smell disorders, and taste problems often accompany them.

Your sense of smell works through specialized cells in your nose called olfactory receptors. These cells detect thousands of different odors and send signals to your brain. Your taste buds, located on your tongue and throat, detect five basic flavors: sweet, salty, sour, bitter, and umami (savory). Interestingly, much of what you perceive as "taste" actually comes from your sense of smell. When you chew food, aromas travel up the back of your throat to your nose, which is why food tastes bland when you have a cold and your nasal passages are blocked.

Several conditions can damage these sensory systems. Post-viral olfactory dysfunction affects many people after respiratory infections, including COVID-19. Approximately 43% of people with COVID-19 experience smell loss. Head injuries, sinus infections, nasal polyps, and certain medications can also cause problems. Aging naturally reduces taste and smell abilities starting around age 60. Smoking damages olfactory receptors and reduces taste sensitivity. Chemotherapy and radiation therapy can affect taste buds and smell receptors.

Understanding why your taste and smell changed is the first step toward recovery. Conditions like temporary congestion differ from permanent nerve damage. Some causes resolve on their own within weeks, while others may take months or require specific treatment approaches.

Practical takeaway: Keep a record of when your taste or smell loss started, what you were doing at the time, and any other symptoms you experienced. This information helps medical professionals identify the underlying cause and recommend appropriate treatment.

When to See a Doctor and What Tests Measure Taste and Smell

If you've lost taste or smell that lasts more than a few weeks, seeing a healthcare provider helps rule out serious conditions and identify what's causing the problem. Some taste and smell loss accompanies treatable conditions like nasal polyps or sinus infections. Other causes, like certain neurological conditions, need professional evaluation.

Doctors use several tests to measure taste and smell function. The University of Pennsylvania Smell Identification Test (UPSIT) shows how well you can identify 40 different smells. The Connecticut Chemosensory Clinical Research Center test uses taste strips to measure your ability to detect sweet, salty, sour, and bitter flavors on different parts of your tongue. Some doctors perform simple smell tests in their office using common scents like coffee or peppermint. Taste threshold tests measure the lowest concentration of flavor you can detect.

During your appointment, your doctor will ask about the timeline of your loss, whether it happened suddenly or gradually, and what else you've noticed. They'll examine your nose for polyps, check for signs of infection, and review your medications since some drugs affect taste and smell. Tell your doctor about recent illnesses, head injuries, or exposure to chemicals. This context matters because different causes have different recovery paths.

Certain test results indicate better recovery outcomes. If your smell tests show some remaining function rather than complete loss, recovery prospects improve. If you lost smell recently rather than years ago, treatment tends to work better. Your age, overall health, and whether you have other conditions all influence how your body may recover.

Practical takeaway: Before your appointment, write down the exact date your symptoms started, any other health changes you noticed around that time, all medications and supplements you take, and whether you smoke or use tobacco products. Bring this list to help your doctor understand your situation fully.

Smell Training: Evidence-Based Exercises to Retrain Your Senses

Smell training, also called olfactory training, involves regularly smelling strong odors to stimulate and potentially repair your olfactory system. Research shows this method helps some people recover smell function, particularly those with smell loss from viral infections. A 2020 study found that people who did smell training exercises for 16 weeks showed meaningful improvement compared to those who didn't train.

The standard smell training protocol uses four distinct scents that you smell for about 15-20 seconds each, twice daily. Common scents include rose, eucalyptus, lemon, and clove, though you can use other strong-smelling items. The goal isn't to enjoy the scents but to concentrate on detecting and remembering them. You're essentially asking your brain to process these odors and rebuild the neural pathways that handle smell signals.

Here's how to perform smell training exercises: Choose four distinct scents with different characteristics. Hold each scent near your nose and take gentle sniffs while concentrating on the smell for about 15-20 seconds. Think about the scent—what it reminds you of, how you'd describe it, whether you like it. Repeat this with each of your four scents. Do this routine twice per day, preferably morning and evening, for at least 12 weeks. Many people continue for longer periods as improvement may take months.

Scent options for training include essential oils (rose, eucalyptus, lemon, clove), spices from your kitchen (cinnamon, nutmeg, cumin, black pepper), fresh herbs (rosemary, mint), or common household items (coffee, vanilla extract, perfume). The specific scents matter less than using distinct, strong-smelling items and practicing consistently. Some people create small bottles with cotton balls soaked in essential oils for convenient practice.

Recovery timelines vary considerably. Some people notice improvement within 8-12 weeks, while others take 6 months or longer. About 25-30% of people with post-viral smell loss experience significant improvement with smell training. Results are less predictable for people with smell loss from head injuries or other causes, though some still benefit. Consistency matters more than intensity—daily practice works better than sporadic intense sessions.

Practical takeaway: Set up a simple smell training kit with four distinct scents in small containers. Schedule practice times right after breakfast and before bed to build the habit. Use a calendar to track your practice sessions and note any changes you observe in your ability to detect odors over weeks.

Dietary and Lifestyle Changes That Support Taste and Smell Recovery

While you work on recovering taste and smell, certain dietary choices and lifestyle modifications may support your body's healing process. Adequate nutrition, particularly specific vitamins and minerals, supports sensory nerve function. Your olfactory system requires proper blood flow and healthy nerve tissue to function, which depends on overall nutritional status.

Zinc plays a significant role in taste and smell function. It supports the production of new sensory cells and maintains existing ones. Foods rich in zinc include oysters and other shellfish, beef, pumpkin seeds, cashews, chickpeas, and lentils. Some research suggests zinc supplementation may help some people recover taste function, though results aren't consistent across all studies. If you're considering zinc supplements, discuss dosage with your healthcare provider since excessive zinc can be harmful.

Vitamin B12 deficiency can cause or worsen taste and smell problems. Vitamin B12 appears in animal products including meat, fish, eggs, dairy, and fortified plant-based alternatives. People with certain digestive conditions or those following strict vegan diets may struggle to get enough B12. Folate and other B vitamins also support sensory nerve health. Good sources include leafy greens, legumes, asparagus, and whole grains.

Vitamin A supports the health of your olfactory epithelium—the tissue containing smell receptors. Orange and yellow vegetables like sweet potatoes and carrots, plus leafy greens and liver, contain vitamin A or its precursors. Antioxidants including vitamins C and E protect nerve tissue from damage. Citrus fruits, berries, nuts, and seeds provide these nutrients.

Quit smoking if applicable, as smoke damages olfactory receptors and reduces taste sensation. Former smokers often experience gradual improvement in taste and smell over weeks or months after quitting. Limit alcohol consumption, which can damage taste buds and interfere with nutrient absorption. Stay hydrated—dehydration impairs taste sensation. Manage inflammation through a balanced diet rich in vegetables and healthy fats, since inflammatory conditions sometimes accompany or contribute to taste and smell loss.