Haze Season in Malaysia: How to Protect Your Lungs During Poor Air Quality

Malaysia’s Haze Problem: An Annual Threat to Lung Health

For Malaysians, the haze isn’t just an inconvenience — it’s a recurring public health emergency. Every year, typically between August and November, transboundary haze from agricultural burning in neighbouring countries blankets the Malaysian peninsula and parts of Borneo, sending air quality plummeting and hospital admissions soaring.

In severe haze episodes — like the devastating 2019 season when the Air Pollutant Index (API) in several states exceeded 300 (hazardous level), or the 2015 crisis that forced school closures nationwide — millions of Malaysians breathe air laden with PM2.5 particles: microscopic pollutants just 2.5 micrometres in diameter, small enough to penetrate deep into the lungs and even enter the bloodstream.

Research published in the Lancet Planetary Health estimates that air pollution from particulate matter contributes to approximately 4.2 million premature deaths globally each year. In Southeast Asia, the health burden of transboundary haze has been estimated at over USD 10 billion annually by researchers at Harvard and Columbia universities.

This article provides a comprehensive, evidence-based guide to protecting your lungs during haze season — covering immediate protective measures, dietary strategies, and long-term respiratory health support.

Understanding the Health Risks of Haze

What’s in the Haze?

Haze from peat and forest fires contains a toxic cocktail of pollutants:

• PM2.5 (fine particulate matter) — The most dangerous component. These particles bypass the nose and throat defences and penetrate deep into the alveoli (air sacs) of the lungs. A 2019 study in NEJM confirmed that long-term PM2.5 exposure is associated with increased mortality even at levels below current regulatory standards.
• PM10 (coarse particulate matter) — Larger particles that irritate the upper airways.
• Carbon monoxide, nitrogen dioxide, sulphur dioxide — Gaseous pollutants that cause inflammation.
• Polycyclic aromatic hydrocarbons (PAHs) — Carcinogenic compounds produced by burning organic matter.
• Volatile organic compounds (VOCs) — Irritants that can trigger respiratory symptoms.

Health Effects: Short-Term and Long-Term

Short-term effects (during haze episodes): irritated eyes, sore throat, coughing, wheezing, shortness of breath, aggravation of asthma and COPD, increased hospital admissions for respiratory and cardiovascular conditions.

Long-term effects (with repeated exposure): A landmark study published in The Lancet following over 650,000 participants found that chronic exposure to PM2.5 increases the risk of lung cancer by 36% per 10 μg/m³ increase. Repeated haze exposure also accelerates decline in lung function, increases chronic respiratory disease risk, and may contribute to cardiovascular disease through systemic inflammation.

Who Is Most Vulnerable?

• Children (lungs still developing)
• Elderly (reduced lung capacity and immune function)
• Pregnant women (PM2.5 exposure linked to low birth weight and preterm birth)
• People with existing respiratory conditions (asthma, COPD, bronchiectasis)
• Outdoor workers (construction, delivery, agriculture)

Immediate Protective Measures During Haze

1. Monitor the Air Pollutant Index (API)

Check the Department of Environment Malaysia’s APIMS system (apims.doe.gov.my) or the myIPU app daily. The API scale:

• 0-50: Good
• 51-100: Moderate
• 101-200: Unhealthy
• 201-300: Very unhealthy
• Above 300: Hazardous

2. Wear a Proper Mask

When API exceeds 100, wear an N95 mask outdoors. Regular surgical or cloth masks do NOT adequately filter PM2.5 particles. N95 masks filter at least 95% of airborne particles. Ensure proper fit — the mask should seal around the nose and mouth without gaps.

3. Stay Indoors When Possible

Keep windows and doors closed during haze. PM2.5 can penetrate indoors but at reduced concentrations if openings are sealed. Use air conditioning on recirculation mode rather than bringing in outside air.

4. Use Air Purifiers

An air purifier with a HEPA filter can reduce indoor PM2.5 levels by 50-80%. Choose one rated for your room size. A study in Indoor Air journal found that HEPA air purifiers significantly reduced indoor PM2.5 concentrations and improved respiratory symptoms.

5. Stay Hydrated

Adequate hydration helps maintain the mucous membranes that line the respiratory tract — your body’s first defence against inhaled particles. Drink at least 8-10 glasses of water daily during haze, more if you must go outdoors.

6. Reduce Outdoor Physical Activity

During exercise, breathing rate increases 10-20 times, dramatically increasing the dose of pollutants inhaled. When API exceeds 100, move workouts indoors. When it exceeds 200, even indoor exercise should be moderated.

Dietary Strategies for Lung Protection

Antioxidant-Rich Foods

Air pollution generates oxidative stress in the lungs. Antioxidants help neutralise free radicals and reduce inflammation. Key nutrients and their food sources:

• Vitamin C — Guava (jambu batu, among the richest sources), oranges, papaya, bell peppers. A study in Epidemiology found that vitamin C intake was associated with reduced lung function decline from air pollution.
• Vitamin E — Almonds, sunflower seeds, palm oil (which Malaysia produces abundantly).
• Beta-carotene — Carrots, sweet potato (keledek), kangkung, spinach (bayam).
• Omega-3 fatty acids — Fatty fish (ikan kembung, sardin). Research in the American Journal of Respiratory and Critical Care Medicine showed omega-3s attenuated the adverse effects of PM2.5 on heart rate variability.
• Sulforaphane — Found in broccoli and cruciferous vegetables. A clinical trial at Johns Hopkins found that broccoli sprout extract enhanced the detoxification of airborne pollutants by up to 61%.

Anti-Inflammatory Foods

Turmeric (kunyit), ginger (halia), green tea, berries, and leafy greens all have documented anti-inflammatory properties that can help protect lung tissue from pollution-induced inflammation.

Long-Term Lung Health: Building Respiratory Resilience

The haze comes every year, and air pollution from vehicles and industry is a year-round concern in Malaysian cities. Building respiratory resilience requires a sustained, proactive approach.

Breathing Exercises

Diaphragmatic breathing and pursed-lip breathing can strengthen respiratory muscles and improve lung efficiency. Research in Respiratory Care showed that breathing exercises improved lung function in patients with chronic respiratory conditions.

Regular Exercise (When Air Is Clean)

Regular cardiovascular exercise improves lung capacity and efficiency. Studies in Medicine & Science in Sports & Exercise show that fit individuals are more resistant to the respiratory effects of air pollution.

Natural Respiratory Support: Traditional Ingredients with Modern Evidence

For centuries, traditional Chinese and Malay medicine have used specific herbs to support lung health. Modern research has begun validating many of these traditional uses:

• Cordyceps sinensis — Perhaps the most studied lung-support mushroom. Research published in Phytomedicine and the Journal of Alternative and Complementary Medicine has shown that cordyceps supplementation improves oxygen utilisation, increases lung capacity, and enhances respiratory endurance. A study in The Journal of Alternative and Complementary Medicine found that cordyceps improved VO2max (maximum oxygen consumption) by approximately 7% in elderly adults.
• Lingzhi (Reishi / Ganoderma lucidum) — Contains beta-glucans that modulate immune function and triterpenes with anti-inflammatory properties. Research in the International Journal of Medicinal Mushrooms documented its benefits for respiratory health, including reduced airway inflammation.
• Astragalus (Huang Qi) — An adaptogenic herb with immunomodulatory properties. Studies published in the Chinese Journal of Integrative Medicine found that astragalus supplementation reduced the frequency and duration of upper respiratory tract infections.
• Mullein (Verbascum thapsus) — Traditional lung herb with documented expectorant and anti-inflammatory properties. Helps clear mucus and soothe irritated airways.
• Marshmallow Root — Its mucilage coats and protects the mucous membranes of the respiratory tract, reducing irritation from inhaled pollutants.

RespVit by HKIII combines all five of these respiratory-supporting ingredients — Cordyceps, Lingzhi, Astragalus, Mullein, and Marshmallow Root — in a single daily supplement. Formulated specifically with the Malaysian environment in mind, RespVit provides year-round lung support that becomes especially valuable during haze season. Rather than waiting for the haze to arrive and scrambling for protection, proactive daily supplementation helps build respiratory resilience over time.

Frequently Asked Questions

What API level is dangerous for health?

API above 100 is classified as “unhealthy” and protective measures should begin. Above 200 is “very unhealthy” — outdoor exposure should be minimised. Above 300 is “hazardous” — a health emergency requiring everyone to stay indoors.

Do regular face masks protect against haze?

No. Surgical masks and cloth masks do not adequately filter PM2.5 particles. Only N95 (or equivalent) masks provide meaningful protection against fine particulate matter. Ensure proper fit with no gaps.

Can haze cause permanent lung damage?

Single haze episodes are unlikely to cause permanent damage in healthy adults, though they can significantly worsen existing conditions. However, repeated annual exposure to severe haze can contribute to chronic lung function decline over time, as demonstrated in longitudinal studies.

Is it safe to exercise during haze?

When API exceeds 100, outdoor exercise should be avoided because heavy breathing dramatically increases pollutant inhalation. Move workouts indoors, ideally in a space with air purification. When API exceeds 200, even indoor exercise should be light.

How long do the effects of haze exposure last?

Acute symptoms typically resolve within days to weeks after air quality improves. However, inflammation from PM2.5 exposure can persist for several weeks. People with chronic respiratory conditions may experience prolonged effects. Supporting recovery with anti-inflammatory foods, adequate hydration, and respiratory support supplements can help.

This article is for informational purposes only and does not constitute medical advice. If you experience severe respiratory symptoms during haze, seek medical attention immediately. For enquiries about RespVit, contact HKIII at +60127851678 or +60167656000.