Mirian Gom 
ABUJA, Nigeria – The C-Circle Foundation for Sustainable Health and Environment has launched a nationwide public health campaign to end the consumption of nzu (edible clay), warning that the commonly eaten substance is a hidden source of dangerous lead poisoning across Nigeria.
The campaign, unveiled in Abuja to mark the 2025 International Lead Poisoning Prevention Week, carries the theme “No Safe Level: Act Now to End Lead Exposure.” It is supported by the Lead Exposure Elimination Project (LEEP).
Environmental toxicologist and head of C-Circle Foundation, Dr. Chimere-May Ohajinwa, said nzu is often sold uncovered and handled in unhygienic conditions, exposing consumers to contaminants beyond lead.
“Edible clay remains a silent but dangerous source of lead exposure,” she said. “Most nzu in markets contain harmful lead levels, and many people consume it without washing. It can also harbour bacteria, dust, and parasites.”
She noted that nzu consumption is especially risky for pregnant women.
“Many believe it eases nausea, but research confirms it is toxic to mothers and unborn babies,” she added.
As part of the campaign, experts appeared on national radio and television stations to educate the public on lead poisoning risks and practical steps to reduce exposure in homes and communities. The foundation also visited antenatal clinics and distributed educational materials in local languages.
Ohajinwa emphasised that lead poisoning is entirely preventable.
“With awareness and enforcement, we can protect mothers and children from toxic exposure,” she said.
Nationwide Campaign Warns: Edible Clay ‘Nzu’ Contains Toxic Lead
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