EVIDENCE-BASED PROTOCOL
Reverse air pollution damage
Long-term [PM2.5](/pollutants/pm25) exposure causes oxidative stress, vascular inflammation, and neuroinflammation that persists after exposure drops. Full reversal is not always possible. The body has real recovery pathways. Stack these interventions.
Cut exposure first
Recovery cannot start while damage compounds. Highest-leverage moves:
- HEPA air purifier in bedroom (you spend a third of life there)
- Upgrade HVAC filter to MERV 13+
- Cooking ventilation - gas stoves spike indoor PM2.5 above 100 μg/m³
- N95 / KN95 outdoors when AQI > 100 (cloth masks do not filter PM2.5)
- Avoid outdoor cardio when AQI > 100
Antioxidants
Chronic pollution depletes endogenous antioxidants (glutathione, SOD, catalase). Evidence-based ways to restore:
- Sulforaphane (broccoli sprouts) - Nrf2 activator, Johns Hopkins benzene clearance trial
- N-acetylcysteine (NAC) - glutathione precursor, multiple COPD RCTs
- Vitamin C + E combo - reduces PM-induced cardiovascular markers
- Omega-3 (fish oil) - Harvard studies on PM heart rate variability
- Curcumin - anti-inflammatory, COPD model evidence
Exercise
Cardio increases air intake but net long-term benefit is positive. Boosts antioxidant production, mitochondrial biogenesis, lymphatic clearance.
- Indoors with HEPA filtration when AQI > 100
- Outdoors when AQI < 100
- Skip entirely when AQI > 150
Sauna
Strong evidence base from 30-year Finnish cohort study.
- Cardiovascular conditioning equivalent to moderate exercise
- Heat shock protein induction protects against oxidative damage
- Sweat-mediated heavy metal clearance (cadmium, lead)
- Dose: 2-4 sessions per week, 15-20 min at 80-90 C
Hyperbaric oxygen therapy (HBOT)
Mechanism overlap with PM damage pathways is substantial. Direct PM2.5 RCTs limited; case rests on adjacent evidence (stroke, TBI, long-COVID) where Tel Aviv group (Hadanny, Efrati) has published cognitive recovery RCTs.
- Hyperoxygenation reduces hypoxia-driven inflammation
- Upregulates SOD, catalase, glutathione (core antioxidant enzymes)
- Promotes angiogenesis in damaged tissue
- Mobilizes CD34+ stem cells (Thom et al.)
- Reduces neuroinflammation linked to cognitive decline
Sleep
Glymphatic clearance of metabolic waste from the brain happens during sleep (Nedergaard et al.). Inflammation and oxidative repair are sleep-dependent.
- Eight hours per night minimum
- Cool, dark, HEPA-filtered bedroom
- Consistent schedule supports glymphatic function
Where to research HBOT chambers
Personal soft-shell chambers (1.3-1.5 ATA) are now available for home use and ship globally. Australian supplier HBOT Australia ships worldwide and is a credible starting point if researching home units. Editorial recommendation, no commercial relationship.
Talk to a doctor before starting HBOT. Contraindications include untreated pneumothorax, certain ear conditions, and some cardiac conditions.
What probably does not help
- Detox teas, supplements, foot pads - no evidence
- IV vitamin drips for "pollution detox" - mostly placebo, occasional kidney risk
- Air-purifying houseplants - effect size in real homes negligible
- Salt rooms / halotherapy - no quality evidence for PM recovery