Educational only — not medical advice

 TL;DR

  • Asthma is driven by airway inflammation — diet and certain nutrients can help lower that inflammation.
  • Magnesium relaxes smooth muscle in the bronchioles and supports better breathing.
  • Many patients have hidden food sensitivities that worsen asthma symptoms.
  • Quercetin and Vitamin C support allergic asthma naturally.
  • Probiotics and gut health are increasingly linked to respiratory health.
  • These are supportive strategies — discuss with your doctor.

Asthma Is Increasing — Why It Matters

Over 27 million Americans have asthma; 4.5 million of them are children (2021 figures).
That is 7.7% of the U.S. population, up from 20.3 million (7.4%) in 2001.

Diet, Inflammation & Asthma

Inflammation of the airways is a major component of asthma. The standard American diet promotes inflammation — but diet shifts can help.

Multiple studies show improved asthma symptoms with:

  • Mediterranean diet
  • High fruit & vegetable intake

(Refs: 1,2,3)

The Roadmap to Health diet on this site follows an anti-inflammatory pattern with meal plans and recipes to help. Click here for the recipes.

Hidden Food Sensitivities

Elimination diets have shown strong improvements:

A study of 188 children with allergic rhinitis or asthma:

  • 62% had total relief after 6 weeks
  • 28% had partial relief
  • 40% had recurrence when trigger foods were reintroduced

(Ref: 5) One novel way to find food sensitivities is the Coca pulse test. 

Food triggers are common but overlooked.

Magnesium — Nature’s Bronchodilator

Magnesium relaxes bronchial smooth muscle.

Evidence includes:

  • IV magnesium reduces hospitalizations for severe asthma
    (Refs: 7,8,9)
  • Asthma patients often have lower magnesium levels (Ref: 12)
  • Supplementation improves symptoms and quality of life
    (Refs: 10–14)

It’s not that magnesium treats asthma — but deficiency makes asthma worse.

Mucus Production & Iodine

Inflammation → excess mucus → mucus plugs → airflow obstruction.

Iodine helps thin mucus, allowing easier clearance.

(This is supportive — not a replacement for meds.)

Allergies & Natural Histamine Support

Allergies are a major driver of asthma.

  • ~60% of asthma in the U.S. is allergic
  • Many adults with asthma have at least one allergy

Quercetin + Vitamin C: Well studied, click here.

  • Reduce airway inflammation
  • Support mast cell stability
  • Improve allergic symptoms

(Refs: 15–23)

Adrenal Support for Asthma & Steroid Use

Chronic corticosteroid use may suppress adrenal function.

Studies show lower cortisol in children and adults using steroid inhalers
(Refs: 24–27)

Supporting stress resilience and adrenal recovery can complement care.

(Work with a doctor trained in natural healthcare.)

The Microbiome & the Gut–Lung Axis

Gut health impacts airway inflammation. Click to learn more.

  • Antibiotic use → increased childhood asthma risk (Ref: 30)
  • Probiotics → reduced wheezing & inflammation in some trials (Refs: 28,29)

Even mild steroid-naive asthma shows microbiome differences (Ref: 28).

Digestive support = respiratory support.

Supportive Strategies Checklist

☐ Anti-inflammatory diet (Mediterranean style)
☐ Test or trial for hidden food sensitivities
☐ Magnesium (dietary or supplemental when deficient)
☐ Systemic enzymes on an empty stomach
☐ Iodine for mucus management (with thyroid monitoring)
☐ Quercetin + Vitamin C for allergic asthma
☐ Gut support: avoid unnecessary antibiotics + consider probiotics
☐ Stress management and adrenal support

FAQ

Can natural supports replace my asthma inhaler?
No. These approaches assist in reducing inflammation and sensitivity but are not replacements for prescribed care. They may, however, reduce the need for it.

Why does diet affect asthma?
Inflammatory foods increase airway reactivity. Anti-inflammatory foods can calm bronchial inflammation.

Is magnesium safe for kids with asthma?
Yes, when guided by a clinician — dosing matters, and IV magnesium is specifically a hospital-based therapy.

References

  1. Int J Food Sci Nutr. 2024 Feb;75(1):4-30. Greater fruit and vegetables consumption, and adherence to a Mediterranean type of diet reduces the risk for asthma in children; a systematic review and meta-analysis
  2. Pediatr Allergy Immunol. 2013 Jun;24(4):330-8. Influence of Mediterranean diet on asthma in children: a systematic review and meta-analysis
  3. Nutr Rev. 2014 Jul;72(7):411-28. Fruit and vegetable intake and risk of wheezing and asthma: a systematic review and meta-analysis
  4. J Asthma. 2013 Feb;50(1):75-81. Influence of mediterranean diet on asthma symptoms, lung function, and systemic inflammation: a randomized controlled trial
  5. Ogle KA, Bullock JD. Children with allergic rhinitis and/or bronchial asthma treated with elimination diet. Ann Allergy 1977;39:8-11.
  6. Aesthetic Plast Surg. Jan-Feb 1999;23(1):41-4. Orally administered proteases in aesthetic surgery
  7. Pediatr Emerg Care. 2018 Jun;34(6):390-395. Intravenous and Nebulized Magnesium Sulfate for Treating Acute Asthma in Children: A Systematic Review and Meta-Analysis
  8. Cochrane Database Syst Rev. 2016 Apr 29;4(4):CD011050. Intravenous magnesium sulfate for treating children with acute asthma in the emergency department
  9. Pediatr Crit Care Med. 2016 Feb;17(2):e29-33. High-Dose Magnesium Sulfate Infusion for Severe Asthma in the Emergency Department: Efficacy Study
  10. J Asthma. 2010 Feb;47(1):83-92. Effect of oral magnesium supplementation on measures of airway resistance and subjective assessment of asthma control and quality of life in men and women with mild to moderate asthma: a randomized placebo controlled trial
  11. Eur Respir J. 1997 Oct;10(10):2225-9. Investigation of the effect of short-term change in dietary magnesium intake in asthma
  12. Medical Principals and Practice Vol 27, Issue 2, May 2019. The Relationship between Hypomagnesemia and Pulmonary Function Tests in Patients with Chronic Asthma
  13. Natural Medicine Journal Jan 15, 2014 Effect of Oral Magnesium Supplementation on Asthma
  14. Eur J Clin Nutr. 2007 Jan;61(1):54-60. Oral magnesium supplementation in asthmatic children: a double-blind randomized placebo-controlled trial
  15. Capasso R, et al. Inhibitory effect of quercetin on rat trachea contractility in vitro. J Pharm Pharmacol. 2009;61(1):115–9
  16. Chang JH, et al. Dietary polyphenols affect MUC5AC expression and ciliary movement in respiratory cells and nasal mucosa. Am J Rhinol Allergy. 2010;24(2):e59–62
  17. Li N, et al. The effect of quercetin on human neutrophil elastase-induced mucin5AC expression in human airway epithelial cells. Int Immunopharmacol. 2012;14(2):195–201
  18. Park H-J, et al. Quercetin regulates Th1/Th2 balance in a murine model of asthma. Int Immunopharmacol. 2009;9(3):261–7.
  19. Rogerio AP, et al. Anti-inflammatory effect of quercetin-loaded microemulsion in the airways allergic inflammatory model in mice. Pharmacol Res. 2010;61(4):288–97.
  20. Nanua S, et al. Quercetin blocks airway epithelial cell chemokine expression. Am J Respir Cell Mol Biol. 2006;35(5):602–10.
  21. Harwood M, et al. A critical review of the data related to the safety of quercetin and lack of evidence of in vivo toxicity, including lack of genotoxic/carcinogenic properties. Food Chem Toxicol. 2007;45(11):2179–205.
  22. Nanua S, et al. Quercetin blocks airway epithelial cell chemokine expression. Am J Respir Cell Mol Biol. 2006;35(5):602–10.
  23. Townsend EA, Emala CW Sr. Quercetin acutely relaxes airway smooth muscle and potentiates β-agonist-induced relaxation via dual phosphodiesterase inhibition of PLCβ and PDE4. Am J Physiol Lung Cell Mol Physiol. 2013;305(5):L396–403.
  24. Thorax (1993;48:599-602) Effects of high doses of inhaled corticosteroids on adrenal function in children with severe persistent asthma
  25. Allergy Asthma Proc. 2016 Jan-Feb;37(1):9-17. Adrenal suppression by inhaled corticosteroids in patients with asthma: A systematic review and quantitative analysis
  26. Arch Dis Child. 1997 May;76(5):405-10 Adrenal function and high dose inhaled corticosteroids for asthma
  27. Ann Allergy Asthma Immunol. 2001 Nov;87(5):379-85. Suppression of hypothalamic-pituitary-adrenal axis activity with inhaled flunisolide and fluticasone propionate in adult asthma patients
  28. Clin Gastroenterol Hepatol. 2022 Jun;20(6):1404-1407.e4. Gut Microbiome Modulation by Antibiotics in Adult Asthma: A Human Proof-of-Concept Intervention Trial
  29. Microbiol Spectr. 2021 Oct 31;9(2):e0085921. Adjunctive Probiotics Alleviates Asthmatic Symptoms via Modulating the Gut Microbiome and Serum Metabolome
  30. Lancet Respir Med. 2020 Nov;8(11):1094-1105. Decreasing antibiotic use, the gut microbiota, and asthma incidence in children: evidence from population-based and prospective cohort studies