Faced with a deepening maize crisis and the threat of unaffordable unga prices for millions of households, the Kenyan government has authorized the importation of yellow maize under a 50% duty waiver. The policy aims to ease the strain on white maize—Kenya’s staple grain for human consumption—by diverting demand from feed manufacturers. By encouraging millers in the animal feed industry to substitute white maize with yellow maize, the government hopes to reduce competition for white maize, making it more accessible and affordable to food processors and, ultimately, to consumers. However, this economic intervention carries unintended consequences that could undermine its goals. Due to Kenya’s fragmented supply chains and patchy enforcement mechanisms, experts warn that the clear division between maize meant for animals and that meant for humans may not hold. The significantly lower price of the imported yellow maize could tempt unscrupulous traders to redirect it into the human food market—either by blending it with white maize flour or selling it directly in low-income areas where yellow maize is already accepted as food, such as parts of Western Kenya. In places like Homa Bay County, where yellow maize is widely consumed in the form of ugali, this policy shift could unintentionally flood the food supply with grain that may not meet safety standards for human consumption.

The core of the concern lies in the persistent and well-documented threat of aflatoxin contamination, a toxic compound produced by mold that thrives in warm, humid conditions—particularly in improperly stored grains. While Kenya has established aflatoxin limits aligned with East African Community standards—10 parts per billion (ppb) for total aflatoxins and 5 ppb for aflatoxin B1—systemic challenges hinder enforcement. Many small-scale producers, informal traders, and millers lack access to the sophisticated equipment and financial resources needed to test for aflatoxins or implement preventive storage solutions. Furthermore, there have been troubling precedents that cast doubt on the robustness of regulatory oversight. In 2011, a shipment of aflatoxin-contaminated maize from the U.S. was allegedly released into the market despite being flagged by authorities, with reports suggesting that the Kenya Bureau of Standards (KEBS) was blocked from conducting proper inspections. More recently, in January 2025, a 2,000-tonne shipment of rice from Pakistan was found to exceed aflatoxin limits, indicating that lapses in import control remain a pressing issue. These incidents demonstrate that having regulations on paper is not enough—especially when imports labeled for animal feed, which undergo less rigorous scrutiny, may be co-opted into the human food chain in the absence of strict monitoring, reliable segregation mechanisms, and transparent accountability.

The potential health implications of increased aflatoxin exposure are grave and far-reaching, especially for vulnerable populations who rely heavily on maize as their primary food source. Acute exposure can lead to severe liver damage, jaundice, and even death, while long-term, low-level exposure is linked to liver cancer, immune system suppression, nutrient malabsorption, and developmental issues in children. Infants and young children face elevated risks due to their small body mass and the fact that complementary weaning foods are often maize-based, yet specific aflatoxin regulations for these products are either absent or poorly enforced. For populations with pre-existing liver conditions, Hepatitis B infections, or compromised immunity—such as people living with HIV—the health risks are significantly amplified. Malnourished individuals and rural subsistence farmers, who often rely on their own poorly stored harvests, are also at heightened risk. In the face of this looming danger, health advocates and food safety experts are calling on the Kenyan government to urgently invest in comprehensive and well-coordinated countermeasures. These include rigorous aflatoxin testing of all maize imports, stricter enforcement to prevent feed-grade yellow maize from entering the human food stream, large-scale public education campaigns targeting high-risk regions, and long-term investments in improved post-harvest storage infrastructure. Without such measures, the policy designed to stabilize food prices could inadvertently trigger a public health emergency—one that disproportionately affects the country’s poorest and most vulnerable.

References:

Nation Kagwe bows to pressure, opens imports as unga prices hit 13-month high

Jijuze Maize Prices Surge: Impact on Kenya’s Livestock and Food Security

Milling Middle East & Africa Kenya to halt maize, sugar imports in 2025 after achieving self-sufficiency

The Star Why state will allow importation 5.5 million bags of yellow maize – Kagwe

Randox Food Diagnostics Kenyans at risk of aflatoxin contamination as KEBS flags 2,000-tonne rice shipment

Business Daily Turn Kenya farms yellow with maize for food security