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Immune & Respiratory

Seasonal Allergies

Reviewed by the Nimbera editorial team · Last updated May 2026

Runny nose, sneezing, itchy eyes, and congestion triggered by pollen, mold, or other airborne allergens

When to see a doctor

Allergies causing disrupted sleep, reduced work performance, or asthma-like symptoms (wheezing, chest tightness, shortness of breath) should be evaluated. Allergy testing and immunotherapy are highly effective long-term treatments.

Natural remedies · 7

Tap any remedy for the full how-to and citation.

How we rate evidence▾

Strong - Multiple randomised controlled trials or systematic reviews with consistent positive outcomes.

Moderate - At least one RCT or several high-quality observational studies with plausible mechanisms.

Limited - Small trials, animal studies, or traditional use with limited human clinical evidence.

Sources link directly to PubMed, Cochrane Reviews, or NCCIH.

Daily Saline Nasal Rinse

topical
Strong evidence
$10-20

HEPA Air Purifier in Bedroom

lifestyle
Moderate evidence
$80-200 plus filter replacements

Quercetin Supplement

ingestible
Limited evidence
$15-35

Strategic Pollen Avoidance

lifestyle
Strong evidence
Free

Butterbur Extract Ze 339

ingestible
Schapowal et al. (n=330) RCT comparing Ze 339 to fexofenadine and placebo found both active arms significantly superior to placebo (p<0.001) with no difference between them. PMID 16114089. A prior landmark BMJ RCT (n=125, PMID 11799030) found butterbur similarly effective to cetirizine without sedative side effects.
$20-$40 per month

Birch Pollen Honey

ingestible
Saarinen et al. (n=50 completers, PMID 21196761) pilot RCT found birch pollen honey consumed pre-seasonally produced a 60% lower total symptom score, twice as many asymptomatic days, and 70% fewer days with severe symptoms vs standard medication. A single pilot study - larger trials are needed to confirm.
$10-$25 per jar (1-month supply)

Probiotics

ingestible
Luo 2022 Frontiers in Immunology (PMID 35663980) - systematic review and meta-analysis of 28 RCTs; probiotics significantly relieved allergic rhinitis symptoms (SMD -0.29, 95% CI -0.44 to -0.13, p=0.0003) and improved rhinitis quality-of-life scores (SMD -0.64) vs placebo; Th1/Th2 ratio improved significantly.
$15-$40 per month depending on brand and CFU count

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Remedy information is compiled from primary clinical sources including PubMed, the Cochrane Library, and the National Center for Complementary and Integrative Health (NCCIH). Evidence ratings reflect published human trial data at time of writing. This content is for informational purposes only and is not a substitute for professional medical advice. Read our full disclaimer.