What question did this study set out to answer?

This study aims to evaluate the health risks associated with heavy metal consumption through fish in urban markets.

June 20, 2026Discover Public HealthOpen Access

Human health risks from multi-metal exposure via fish consumption in urban markets of southwestern Nigeria

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Randomized trial assesses health risks from heavy metal exposure in fish markets, highlighting urgent safety needs.

This study aims to evaluate the health risks associated with heavy metal consumption through fish in urban markets.
Collected fish samples monthly from four urban markets over 12 months.
Assessed metals: arsenic, cadmium, chromium, cobalt, manganese, lead, and nickel using atomic absorption spectrophotometry (AAS).
Conducted health risk assessments using hazard quotient, hazard index, and cancer risk models.
Hazard quotients exceeded 1.0 for Pb, Cd, and As during specific months and markets, especially in dry season.
Annual hazard index values were 1.58 for hake and 1.67 for herring, indicating health risks.
Carcinogenic risk assessments identified As and Cd as major contributors, with values exceeding the acceptable range in February.

Laoye et al. (2026) studied this question.

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