Protect Yourself

Practical, evidence-based steps to reduce your exposure to airborne particulate matter and support your body's natural detoxification pathways. Every recommendation below is backed by peer-reviewed research. This is not medical advice — consult your healthcare provider before starting any supplement.

Top Tier — Strongest Evidence

NAC (N-Acetyl Cysteine)

600-1,800 mg/day

The precursor to glutathione, your body's master antioxidant. NAC has direct metal-chelating ability via its thiol group and protects the respiratory system. 33 animal studies showed it chelates mercury, lead, cadmium, and arsenic. 15 human studies reported no significant adverse effects and no depletion of essential minerals. In mice, oral NAC accelerated urinary methylmercury excretion to 47-54% over 48 hours vs 4-10% in controls. Also established for chronic respiratory disease support and reducing oxidative stress from air pollution exposure.

PMC: NAC in Chronic Respiratory DiseasesPMC: NAC as Metal ChelatorPMC: NAC and Methylmercury ExcretionPMC: NAC Safety at High Doses

Modified Citrus Pectin

15 g/day in divided doses

A modified form of pectin from citrus peels, broken down for better absorption. Pilot trials showed a 560% increase in lead excretion, 150% increase in cadmium excretion, and 130% increase in arsenic excretion via urine. A study in children with lead toxicity found 15g/day was effective with no negative side effects. Importantly, it did NOT increase loss of essential minerals (calcium, magnesium, zinc, selenium, iron) — suggesting selective binding of toxic metals over beneficial ones.

PubMed: MCP Increases Urinary Metal ExcretionPubMed: MCP for Lead in ChildrenPubMed: MCP/Alginates Case ReportsPMC: Pleiotropic Effects of MCP

Omega-3 Fatty Acids (EPA/DHA)

1,000-3,000 mg EPA+DHA/day

The EPA itself has published on this. Data from the UK Biobank showed participants with high circulating omega-3 and air pollution exposure had a 35% lower risk of developing COPD. Animal studies confirmed oral DHA and EPA alleviated lung lesions and restored normal inflammatory cytokine levels in PM2.5-exposed mice. Vegetarian sources: algae-based EPA/DHA supplements go straight to the source (fish get their omega-3s from algae). Also found in fatty fish, flaxseed, chia seeds, and walnuts.

EPA: Omega-3 and Air Pollution ProtectionPMC: Omega-3 Attenuates PM2.5 Lung InjuryACS: Omega-3 Modifies COPD Risk from Air Pollution

Vitamin C

500-1,000 mg/day in divided doses

A water-soluble antioxidant concentrated in the lining fluid of your lungs — the first line of defense against inhaled oxidants. A 2025 study from the University of Technology Sydney found vitamin C significantly reduces lung inflammation and mitochondrial damage caused by everyday PM2.5 exposure. Pre-treatment reduced harmful inflammation, prevented oxidative stress-induced cell damage, and protected mitochondria. Found naturally in citrus fruits, bell peppers, strawberries, broccoli, and kiwi.

ScienceDirect: Vitamin C Attenuates PM2.5 Lung Inflammation (2025)European Respiratory Journal: Antioxidants and Air PollutionPubMed: Vitamin C and Quercetin vs PM Oxidative Damage

Strong Support

HEPA Air Filtration

HEPA purifiers reduce indoor PM2.5 by 45-78%. In the room where the purifier runs, studies measured ~79% reduction. A budget alternative: the Corsi-Rosenthal box (4 MERV-13 furnace filters taped to a box fan, ~$65) achieved a 92% PM2.5 reduction and outperformed many commercial units. Keep windows closed during high pollution events. Look for "True HEPA" — not "HEPA-type" which has lower filtration standards.

PMC: HEPA Efficacy on Indoor PM2.5CDC: Real-World HEPA Air Cleaner EffectivenessEPA: DIY Air Cleaners for Wildfire Smoke

Sauna (Infrared or Traditional)

15-30 min, 2-4x/week

Sweating provides a supplementary excretion pathway. A systematic review found arsenic, cadmium, lead, and mercury are excreted in measurable quantities through sweat, with concentrations in some cases exceeding those in blood or urine. Infrared sauna sweat showed higher concentrations of aluminum, arsenic, cadmium, nickel, lead, and mercury compared to conventional exercise. This is a secondary pathway — not a replacement for liver and kidney function, but a meaningful supplement. Hydrate well and replace electrolytes after each session.

PMC: Heavy Metals in Sweat — Systematic ReviewPMC: Infrared Sauna and Inorganic Ion ExcretionPMC: Sweat Metal Excretion Under Different Conditions

Zeolite (Clinoptilolite)

A volcanic mineral with a cage-like structure that traps heavy metal ions via ion exchange in the gut. Clinical studies found it increased urinary excretion of lead, cadmium, and arsenic. In lead-exposed mice, it decreased intestinal lead accumulation by over 70%.Product quality warning: Some commercial zeolites are contaminated with the very metals they claim to remove (arsenic up to 118.7 mg/kg, lead up to 58.8 mg/kg in tested products). Only buy third-party tested products.

PMC: Zeolite Clinoptilolite Safety and Medical ApplicationsPMC: Clinical Evaluation of Zeolite SupplementationPMC: Activated Clinoptilolite Suspension Clinical Evidence

Spirulina

3 g/day

A blue-green algae with 58 preclinical studies and 5 human clinical studies demonstrating protective effects, strongest for arsenic. Has a dual mechanism: binds metals AND provides antioxidant protection through phycocyanin. A study in Bangladesh found spirulina combined with zinc significantly reduced arsenic levels in children's urine and improved arsenic-related skin conditions.Same contamination warning as zeolite — spirulina bioaccumulates metals from its growing environment. Third-party tested products only.

PubMed: Spirulina and Heavy-Metal Toxicity MitigationPMC: Spirulina Against Heavy Metal Toxicity in Cells

Quercetin + Bromelain

500-1,000 mg each/day

Quercetin is a plant flavonoid found in onions, apples, and berries. A clinical trial in COPD patients showed it was safe, reduced markers of lung inflammation and oxidative stress, and the majority reported improvement in respiratory symptoms. Animal studies show it prevents emphysema from smoke exposure. Bromelain (from pineapple) reduces airway inflammation and enhances quercetin absorption. Take bromelain between meals for best effect.

PMC: Quercetin Alleviates PM2.5 Chronic Lung InjuryPMC: Quercetin Clinical Trial in COPDPMC: Bromelain in Allergic Airway Disease

Nasal Saline Irrigation

A simple, immediate action after exposure. Studies demonstrated 80% or greater recovery of deposited particulate matter from nasal passages using saline irrigation. Use a squeeze bottle or neti pot with isotonic saline after being outdoors during poor air quality.Always use distilled, sterile, or previously boiled and cooled water — never tap water, due to rare but serious infection risk.

MedCrave: Saline Irrigation Removes 80%+ of Deposited ParticlesPMC: Nasal Irrigations — Clinical Review

Quick Reference — During Poor Air Quality

Close all windows and doors. Run HEPA purifier or build a Corsi-Rosenthal box.

Wear an N95 or KN95 mask outdoors. Fit matters more than the rating — seal it tight.

Check real-time air quality at AirNow.gov or PurpleAir.com before going outside.

Avoid generating indoor particulates: no candles, incense, gas stove, or fireplace.

Best outdoor window: late morning through early afternoon (10 AM - 2 PM) when pollutants disperse.

Irrigate nasal passages with saline after any outdoor exposure.

Keep children indoors when AQI exceeds 100. They breathe faster and inhale more per pound of body weight.

Seek emergency care for: severe difficulty breathing, chest pain, blue lips, confusion, or coughing blood.

Disclaimer: This page presents peer-reviewed scientific research for informational purposes only. It is not medical advice. Consult a qualified healthcare provider before starting any supplement, especially if you are pregnant, nursing, taking medications, or have a medical condition. Supplement quality varies widely — choose products with third-party testing (NSF, USP, or ConsumerLab certification). SkyLedger does not sell supplements or receive compensation from supplement companies.