Post-COVID Smell Recovery-what Finally Works Now
- 01. Post-COVID Taste Loss: Treatments People Swear By
- 02. Why Post-COVID Smell and Taste Often Fade
- 03. Proven Treatments for Smell and Taste Recovery
- 04. How to Start Olfactory Retraineering at Home
- 05. Effective Foods and Flavors to Try
- 06. When to Seek Medical or Specialist Care
- 07. What The Data Show About Recovery Timelines
- 08. Illustrative Treatment Comparison Table
Post-COVID Taste Loss: Treatments People Swear By
Most people who lose smell and taste after COVID-19 recover within several months, but many can speed up and deepen that recovery with structured, evidence-backed treatments. The cornerstone of current post-COVID sensory rehab is olfactory retraining, which involves daily smelling of four strong odors for 15-25 seconds, twice a day, for several weeks to months. Studies show that roughly 74-95% of patients report at least partial chemosensory recovery within 3-12 months, and those who start structured retraining early tend to improve faster than those who wait.
Why Post-COVID Smell and Taste Often Fade
After SARS-CoV-2 infection, the virus can damage the olfactory epithelium in the nasal cavity, where odor-sensing nerve cells live, and also disrupt signaling in the olfactory bulb of the brain. This is why many people initially experience sudden anosmia (loss of smell) and dysgeusia (distorted taste), rather than a gradual decline. A 2024 NIH-backed longitudinal study found that about 15-20% of patients still reported some degree of smell or taste disturbance six months out, but fewer than 5% remained severely impaired at one year, suggesting that most neural regeneration is possible but not guaranteed.
Several factors make recovery more likely: younger age, milder initial infection, earlier start of retraining, and absence of significant nasal polyps or chronic sinus disease. Conversely, older adults, those with diabetes or autoimmune conditions, and individuals who endured prolonged ICU stays often report slower or incomplete recovery of gustatory function. These patterns emerged clearly in a 2023 multicenter cohort study that followed 1,240 patients from 30 to 180 days post infection.
Proven Treatments for Smell and Taste Recovery
The single most widely recommended treatment for post-viral smell loss is olfactory training, typically using four distinct scents per day (for example, rose, lemon, clove, and eucalyptus). Patients are instructed to sniff each scent for about 15-25 seconds, twice daily, while mentally evoking memories of that odor, for at least 12 weeks; some protocols extend this to six months. In a 2022 Mayo Clinic review, clinicians reported that patients who adhered to this regimen reported subjective improvement in 60-80% of cases, with smaller but measurable gains in objective smell tests.
In addition to olfactory training, several medical and nutritional approaches are being tested:
- Topical corticosteroid sprays to reduce inflammation in the nasal lining and support regeneration of olfactory neurons.
- Oral steroids or anti-inflammatory regimens in selected cases of persistent hyposmia, often combined with blood-flow-modulating agents such as mesoglycan.
- Vitamin A nose drops to stimulate epithelial cell turnover; early trials show modest improvement in some patients but are not yet standard care.
- Nutritional counseling to address weight loss and micronutrient deficiencies, especially zinc and vitamin B12, which are linked to healthy taste receptor function.
How to Start Olfactory Retraineering at Home
Setting up a simple home retraining station can be done with inexpensive, widely available items. Experts recommend starting within the first 2-6 weeks after symptom onset, since a 2021 abscent.org-backed consensus statement emphasized that early intervention correlates with better outcomes.
Follow this basic protocol:
- Choose four strong, distinct scents (e.g., rose, lemon, clove, and eucalyptus) using essential oils, spices, or fresh foods like citrus zest or herbs.
- Place each scent in its own small container or jar so you can bring it close to your nose without touching nostrils.
- For each scent, sniff gently for 15-25 seconds, then rest for 10-15 seconds before moving to the next one.
- Repeat the full set twice daily (morning and evening) for at least 12 weeks; some ENT specialists recommend cycling to a new set of four scents after three months.
- Track progress weekly in a journal or app, noting any changes in sensitivity to coffee, garlic, perfume, or other everyday smells.
For patients who progress slowly, specialists sometimes add temperature-varied food trials-eating foods at different temperatures (e.g., hot soup vs. cold yogurt) to engage the trigeminal nerve and heighten perceived flavor. This simple trick is recommended in several university-based post-COVID nutrition guides as a way to make meals more satisfying even when taste is still impaired.
Effective Foods and Flavors to Try
When gustatory numbness lingers, many clinicians advise focusing on foods that stimulate other sensory channels-especially strong aromas, textures, and temperatures. A 2026 clinical guide from UCHealth notes that strongly flavored ingredients such as ginger, peanut butter, fresh herbs, and citrus can help "wake up" the olfactory system during retraining.
Sample foods and techniques that patients commonly report helpful include:
- High-aroma foods: dark chocolate, aged cheese, roasted garlic, coffee grounds, and pine nuts.
- Sour or tart items: lemon juice, pickles, vinegar-based dressings, and citrus fruits, which can heighten sour and salty perception.
- Spicy or pungent foods: chili, horseradish, wasabi, and fresh ginger, which activate the trigeminal system and can feel "stronger" even when smell is weak.
- Texture-rich combinations: crunchy salads with nuts, crispy roasted vegetables, or mixed-grain dishes that contrast soft and crunchy elements.
To maximize benefit, practitioners suggest pairing specific foods with your smell training sessions. For example, smelling lemon while sipping lemon-water or eating a small piece of ginger can help the brain reassociate the aroma with flavor.
When to Seek Medical or Specialist Care
Not all post-COVID chemosensory dysfunction can be managed at home. Current guidelines recommend in-person evaluation if someone has no detectable smell or distorted olfactory perception (such as persistent foul odors) for more than six weeks, or if they experience worsening nasal obstruction, bleeding, or facial pain.
ENT specialists may use nasal endoscopy, smell-threshold tests, and sometimes imaging to rule out other causes such as chronic sinusitis, nasal polyps, or, rarely, brain-stem lesions. In selected patients, a short course of systemic corticosteroids plus a glycosaminoglycan-based agent (mesoglycan) has been shown in small trials to modestly improve persistent hyposmia and dysgeusia, though these protocols remain adjunctive rather than first-line.
What The Data Show About Recovery Timelines
Recent cohort studies give a realistic picture of how post-COVID recovery unfolds over time. One 2023 US multicenter study tracked self-reported smell and taste over six months; it found that 74% of patients reported at least partial smell recovery by 30 days, 86% by 60 days, 90% by 90 days, and 96% by 180 days. Taste tended to recover slightly faster, with 79% improvement at 30 days and 98% at 180 days.
Another study focusing on persistent cases showed that about 10-15% of patients had only partial improvement after 90 days, and these were more likely to be older adults or those who had delayed starting olfactory rehabilitation. This aligns with expert consensus that the "critical window" for intensive retraining is roughly the first 8-12 weeks, after which gains may slow but still occur.
Illustrative Treatment Comparison Table
The table below summarizes major treatment approaches for post-COVID smell and taste loss, including how they are delivered, typical duration, and evidence grade based on current clinical reviews and trials.
| Treatment | How It's Used | Typical Duration | Evidence Strength |
|---|---|---|---|
| Olfactory retraining | Twice-daily sniffing of four strong scents (e.g., rose, lemon, clove, eucalyptus) for 15-25 seconds each. | 12-24 weeks, with some protocols cycling to new scents after 3 months. | Strongest evidence; widely recommended in ENT and neurology guidelines. |
| Nasal corticosteroid sprays | Once- or twice-daily nasal spray to reduce inflammation in the olfactory region. | Usually 4-12 weeks; often combined with smell training. | Moderate; helpful mainly in inflammatory or allergic-type cases. |
| Oral steroid + mesoglycan combo | Short course (e.g., 10-14 days) of oral corticosteroids plus mesoglycan for persistent hyposmia. | Days to weeks; reserved for non-responders after retraining. | Low-to-moderate; based on small trials, not yet standard. |
| Vitamin A nasal drops | Regular drops applied directly into the nasal cavity to support epithelial cell regeneration. | Several weeks; still experimental in many centers. | Low; promising but not yet routine. |
| Diet and texture-focused rehab | Using strongly flavored, textured, and temperature-varied foods to enhance perceived flavor. | Ongoing, integrated into daily meals. | Moderate; strong clinical consensus but few randomized trials. |
Expert answers to Post Covid Smell Recovery What Finally Works Now queries
How long does it usually take to regain taste after COVID?
Most people notice at least partial improvement in taste perception within a few weeks, with large studies showing that 79-98% of patients report meaningful recovery between 30 and 180 days. Individual timelines vary, but those who start olfactory retraining early and have no major comorbidities tend to recover faster than those who wait or have underlying neurological risk factors.
Can smell and taste ever fully come back after COVID?
In the vast majority of patients, chemosensory function either fully or substantially returns within 6-12 months, with large cohort analyses placing long-term profound loss at under 5%. Some people report residual distortion (such as phantom smells), but even these often improve with time and structured rehab.
What should I avoid trying at home?
Clinicians strongly advise against putting strong objects like garlic cloves, paper, or household items deep into the nasal passages, as this can cause injury or infection. Highly concentrated essential-oil "diffusing" directly into the nose without proper dilution is also discouraged, as it can irritate delicate olfactory tissue.
Is there a difference between home remedies and clinical treatments?
Home-based smell training and flavor-focused eating are often the first line, while clinical treatments such as nasal steroids, oral medications, or vitamin-A regimens are reserved for persistent or severe post-viral anosmia. Both layers are complementary; the strongest outcomes are usually seen when patients combine disciplined home practice with timely specialist evaluation.
Can kids lose smell and taste after COVID, too?
Yes; pediatric patients are also susceptible to post-COVID smell loss, though overall recovery rates in children appear slightly higher and faster than in older adults. Pediatric ENT guides recommend gentle, age-appropriate versions of olfactory retraining using familiar scents such as fruit, peanut butter, or vanilla, under parental supervision.
What if I'm still not improving after several months?
If there is little or no improvement in olfactory function after 3-6 months despite consistent retraining, specialists may order objective tests, consider additional medications, or explore whether non-COVID conditions (such as chronic sinus disease or neurodegenerative disorders) are contributing. Persistent severe loss is uncommon but warrants a full workup.