Allergy Relief
Relief from seasonal and environmental allergy symptoms.
TL;DR
Seasonal allergy symptoms respond best to nasal saline, allergen avoidance, and antihistamines; among supplements, quercetin, spirulina, and vitamin C have modest human evidence as adjuncts. Start before pollen season.
Why It Matters
Allergic rhinitis is IgE-mediated mast cell activation with histamine, leukotriene, and cytokine release. Supplements with mast-cell-stabilizing or anti-inflammatory properties (quercetin, vitamin C, spirulina) show small-to-moderate effect sizes in RCTs, inferior to intranasal steroids but useful for mild symptoms or as add-ons.
How to Measure
Track Total Nasal Symptom Score (congestion, rhinorrhea, sneezing, itching) daily during season; note rescue antihistamine use.
Biomarkers
Optimization Protocol
Begin 4–6 weeks before season: Quercetin 500 mg twice daily; Vitamin C 1–2 g/day; Spirulina 2 g/day has positive RCT data. Continue standard care (intranasal steroid/antihistamine) as prescribed.
Lifestyle Levers
- •HEPA filtration
- •Shower after outdoor exposure
- •Keep windows closed on high-pollen days
- •Nasal saline rinses
Supporting Supplements
Quercetin
Small RCTs show reduced nasal symptoms; bioavailability limits real-world effect.
Spirulina
One well-known RCT showed spirulina improved allergic rhinitis symptoms versus placebo.
Vitamin C
Vitamin C has mild antihistamine properties; trials show small symptom reductions at higher doses.
Supporting Research
Frequently Asked Questions
Typical Timeframe
2–4 weeks of loading before season; effects assessed across a season.
Research Summary
My Notes
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This information is for educational purposes only. Always consult a healthcare professional before starting any supplement regimen.