Antioxidant‑Rich Diet Cuts Air‑Pollution Symptoms Among Accra Street Vendors, Study Finds

Key Takeaways

• Weekly provision of oranges, peanuts, sunflower oil, eggs and sardines reduced cough incidence by 55% among participants.
• Risk of irregular heartbeat fell by 92% for vendors receiving the antioxidant‑rich diet.
• Average PM2.5 exposure along study routes was ~40 µg/m³, more than double the WHO guideline.
• Researchers stress nutrition complements, not replaces, stricter air‑quality regulation.

A year‑long intervention led by the University of Cape Coast examined whether dietary antioxidants could offset the health burden of chronic air‑pollution exposure among street vendors in Accra. Three hundred seven vendors were followed across major traffic corridors, with half receiving a curated supply of antioxidant‑dense foods.

The study coincided with persistent high‑volume vehicle traffic on roads such as Atomic Junction, Madina and Kwame Nkrumah Circle, where ambient PM2.5 consistently exceeded safe limits. Researchers recorded symptom frequency, cardiovascular markers and hospital admissions throughout the twelve‑month period.

Study Design and Exposure Context

Participants were randomly assigned to an intervention group that received weekly portions of oranges, peanuts, sunflower oil, eggs and sardines, or to a control group that continued their usual diet. Air‑quality monitors positioned along the vendors’ routes logged an average PM2.5 concentration of 40 µg/m³, a level linked in epidemiological literature to elevated cardiopulmonary risk.

The selection of foods targeted key antioxidants—vitamin C, vitamin E, selenium and omega‑3 fatty acids—known to neutralize oxidative stress caused by inhaled particulate matter. Compliance was monitored through weekly distribution logs and self‑reported consumption diaries.

Health Outcomes Linked to Antioxidant Intake

After twelve months, the intervention cohort reported markedly fewer respiratory and cardiovascular symptoms. Persistent cough prevalence dropped by 55%, difficulty breathing by 60%, and dizziness by 81% compared with controls. The most pronounced effect was observed for irregular heartbeat, with a 92% reduction in incidence.

Hospital admissions for the monitored conditions were 66% lower among vendors receiving the antioxidant‑rich diet. These findings align with mechanistic studies that demonstrate how antioxidants scavenge free radicals generated by particulate exposure, thereby mitigating inflammatory pathways.

Implications for Public Health Policy

The results underscore nutrition as a viable adjunctive strategy for populations unable to avoid outdoor work. However, study leaders caution that dietary measures are not a substitute for robust air‑quality governance. Ghana’s current regulatory framework lacks enforceable emission standards, and sources such as vehicle exhaust, open burning and industrial activities continue to drive pollutant levels.

Policymakers are urged to integrate nutritional guidance into occupational health programs while accelerating investments in emission controls, urban planning and public‑transport upgrades. Collaborative efforts between health ministries, municipal authorities and labor unions could institutionalize food‑supplement schemes for vulnerable workers.

Looking Ahead

Future research should explore scaling the intervention to other high‑exposure occupations and assess long‑term cardiovascular outcomes beyond symptom reporting. Simultaneously, Ghana must prioritize air‑quality legislation that aligns with WHO thresholds to protect all citizens, not only those with dietary safeguards.

Combining personal protective measures—such as masks and dietary antioxidants—with systemic pollution reduction offers the most comprehensive pathway to safeguard the health of Accra’s street‑level economy.