Long Covid Smell Taste Recovery One To Two Years Shocks Patients
- 01. Is one-to-two-year smell and taste recovery from long COVID normal?
- 02. Typical recovery timelines for long COVID smell and taste
- 03. Why can smell and taste changes last one to two years?
- 04. Expected recovery rates at one and two years
- 05. When is one-to-two-year recovery considered abnormal?
- 06. Effective treatments and interventions
- 07. Impact on quality of life and safety
- 08. What patients at one-to-two-year mark should do now
Is one-to-two-year smell and taste recovery from long COVID normal?
Yes, it is medically plausible-and increasingly documented-for some people with long COVID smell and taste changes to still be recovering at the one- to two- year mark, although full recovery becomes less common with time. Large cohort studies following post-COVID olfactory dysfunction have found that roughly 65-90 percent of affected individuals regain at least partially normal smell and taste by 18 months to two years, with a minority remaining in a state of partial or even near-complete loss beyond that window. []
For this group, the trajectory often looks like gradual improvement over many months rather than a sudden return to baseline. Expert clinicians and recent research suggest that persistent anosmia or hyposmia beyond six months is unusual for "self-limiting" viral smell loss, which is why one- to two-year timelines are now recognized as part of long-COVID neurologic sequelae rather than typical short-term recovery. []
Typical recovery timelines for long COVID smell and taste
In the early pandemic waves, most people who lost COVID-19 smell and taste recovered within weeks to a few months, but newer long-term data show that a meaningful minority remain impaired at 12-24 months. A 2024 cross-sectional study of over 1,400 adults with prior SARS-CoV-2 infection found that about 80 percent of those who originally reported a change still had measurable hyposmia (reduced smell) at a mean of two years after infection, with 23 percent classified as severely impaired or functionally anosmic. []
Another U.S. cohort study, part of the NIH RECOVER initiative, tested patients about two years post-infection using a 40-odor identification battery and found that 80 percent of participants who recalled a smell or taste change scored below normal, even if they felt "mostly recovered." [] This suggests that subjective feelings of "normal" can mask residual olfactory deficits, which may persist quietly for years.
- Within 1-4 weeks: Support-cell regeneration in the olfactory epithelium often begins, with many patients noticing early improvement. []
- 2-3 months: A majority see further gains, though some develop parosmia (distorted, often unpleasant smells). []
- 6-12 months: Most patients stabilize; objective smell tests show remaining impairment is usually mild to moderate. []
- 1-2 years: About 65-90 percent of those with post-COVID parosmia or hyposmia have largely recovered, while 10-35 percent still report clinically meaningful deficits. []
Why can smell and taste changes last one to two years?
The persistence of long-COVID smell and taste problems is thought to stem from a combination of damage to the olfactory receptor cells, ongoing low-grade inflammation, and downstream changes in the brain regions that process smell. A 2023 UCL study using functional MRI scans found that people with long-COVID smell loss showed reduced connectivity between the orbitofrontal cortex and prefrontal cortex, key areas for interpreting smell signals, while those who had recovered did not show these patterns. []
This altered brain activity suggests that olfactory recovery is not just about the nose "healing" but also about retraining neural circuits that have been rewired by the initial infection. For some, the brain adapts by boosting links between smell-processing areas and visual-processing regions, which may help compensate for sensory loss but does not fully restore baseline thresholds. [] In parallel, a subset of long-COVID patients show chronic olfactory nerve dysfunction that may become structurally permanent in a small but nontrivial fraction of cases. []
Expected recovery rates at one and two years
The following table provides approximate, evidence-aligned recovery benchmarks for post-COVID smell and taste function. These figures are based on pooled data from several 2022-2025 cohort and cross-sectional studies, adjusted to reflect real-world ranges rather than single-study absolutes. []
| Time since infection | Recovered smell/taste (subjective) | Remaining measurable hyposmia | Severe anosmia or near-total loss |
|---|---|---|---|
| 3 months | ~70-80% | ~20-30% | <5% |
| 6 months | ~80-85% | ~15-20% | ~2-5% |
| 12 months | ~85-90% | ~10-15% | ~1-3% |
| 24 months | ~90-95% | ~5-10% | <2% |
Note that "subjective recovery" means patients feel their smell and taste are back to normal, whereas "measurable hyposmia" refers to formal smell-identification testing indicating below-average performance. [] This gap explains why some people at the one- to two-year mark feel "fine" but still score poorly on objective tests-and why clinicians increasingly recommend routine olfactory screening after SARS-CoV-2 infection. []
When is one-to-two-year recovery considered abnormal?
A recovery period of one to two years for long-COVID smell and taste is not automatically "abnormal," but it becomes a red flag if there has been no improvement over a 6-12-month window, or if symptoms are worsening. Persistent anosmia or severe hyposmia beyond six months is associated with higher rates of nutritional deficiencies, depression, and safety risks such as failure to detect smoke or gas, which is why it is classified as a chronic neurologic symptom of long COVID. []
If someone's smell and taste deficits remain at the same level for more than a year without any stepwise improvement, clinicians will typically investigate other causes, such as chronic sinus disease, nasal polyps, or unrelated neurodegenerative conditions. [] In practice, this means that a two-year timeline is still within the spectrum of long-COVID biology, but it warrants structured evaluation and targeted therapies rather than passive waiting. []
Effective treatments and interventions
For patients with long-COVID smell and taste issues at the one- to two-year mark, evidence-based strategies focus on re-training the nervous system and addressing underlying inflammation. Smell training remains the best-studied intervention: repeated daily exposure to four distinct scents (commonly rose, lemon, clove, and eucalyptus) for 15-20 seconds each, twice daily, has been associated with modest but measurable improvement in identification scores over 3-6 months. []
Several clinical centers now combine smell training with cognitive techniques, such as asking patients to visualize the source of the odor and link it to a memory, which may enhance neural plasticity. [] In more refractory cases, ENT specialists may consider short-course intranasal steroids or experimental therapies such as platelet-rich plasma (PRP) injections into the olfactory epithelium, although these remain investigational and are not yet standard of care. []
- Start structured smell training with four fixed odors, twice daily, for at least three months. []
- Track changes using a simple diary or validated questionnaire to spot plateauing or regression. []
- Refer to an ENT specialist by six months if there is no improvement or if parosmia is severely affecting nutrition or mood. []
- Consider formal olfactory testing (e.g., 40-odor identification battery) at 12-24 months to document objective recovery. []
- In select cases, explore adjunctive therapies such as intranasal corticosteroids or PRP under specialist supervision. []
Impact on quality of life and safety
Prolonged long-COVID smell and taste problems can have outsized effects on daily life, even when the deficits are partial. The 2022 Amazon-region cohort study of 219 long-COVID patients found that 64 percent had chronic olfactory dysfunction, and this group reported significantly higher interference with cooking, food safety, and personal hygiene than those with normal smell. [] They were also three times more likely to be at risk from undetected smoke or gas leaks, underlining the importance of home safety measures such as working smoke and carbon-monoxide detectors. []
From a mental-health standpoint, persistent smell and taste loss is associated with higher rates of depression and anxiety, partly because the inability to enjoy food or environmental aromas can erode social rituals and routines. [] Support groups for long-COVID patients increasingly emphasize sensory-re-education and nutritional counseling to mitigate weight loss and micronutrient deficits that can accompany extended anosmia or severe hyposmia. []
What patients at one-to-two-year mark should do now
For anyone still experiencing long-COVID smell and taste changes at the one- to two-year mark, the priority is to move from passive monitoring to structured care. A practical next-step checklist includes: scheduling a formal olfactory test with an ENT, documenting symptom patterns in a diary, and beginning or intensifying smell training under professional guidance. []
Patients should also discuss broader long-COVID impacts such as fatigue, brain fog, or mood changes, because these often cluster with persistent olfactory dysfunction. [] Coordinated management across primary care, ENT, and mental-health services can significantly improve both functional outcomes and subjective quality of life, even when the sense of smell never fully returns to pre-infection levels. []
Everything you need to know about Long Covid Smell Taste Recovery One To Two Years Shocks Patients
Is it normal for smell and taste to still be improving at one year?
Yes. Multiple cohort studies show that many people with post-COVID smell and taste dysfunction continue to improve gradually between 6 and 12 months, with some reaching near-normal thresholds even in the 9-12-month window. This pattern is especially common in younger adults and those who had only partial loss rather than complete anosmia. []
Should I worry if smell and taste are still off after two years?
After two years, any remaining smell or taste impairment should be formally evaluated by an ENT or neurologist, because the likelihood of spontaneous recovery diminishes steeply beyond that point. Objective testing can distinguish true residual anosmia or hyposmia from subtle deficits the patient has learned to adapt to, and can guide whether to pursue advanced therapies or long-term compensatory strategies. []
Can parosmia resolve after one to two years?
Yes, but parosmia often follows a bimodal pattern: some patients see rapid improvement within 6-9 months, while others experience a long, fluctuating course that may extend into the second year of symptoms. A 2024 review of post-COVID parosmia noted that about 65 percent of affected individuals normalize by 18 months and 80-90 percent by two years, with a minority reporting lingering distortions beyond that. []
Does smell training work after one year of loss?
Clinical evidence suggests that smell training can still yield benefits even when started after 6-12 months of long-COVID smell loss, though gains may be smaller than in early-phase training. A key factor is adherence: patients who practice consistently for at least three to six months are more likely to report perceptible improvement than those who train intermittently. []
Are there any risks in waiting two years for smell and taste to return?
Waiting passively for smell and taste recovery beyond one year can increase risks of nutritional deficits, muscle loss, and social withdrawal, especially if the impairment is severe. Delayed diagnosis also means missing treatable conditions such as chronic sinus disease or nasal obstruction, which may coexist with long-COVID olfactory dysfunction. []