Glyphosate Exposure in Poultry Linked to Major Health Risks

By Andi Anderson

A new review published in the World’s Poultry Science Journal highlights extraordinary health threats posed by glyphosate, the widely used herbicide known commercially as Roundup.

The study finds that glyphosate residues, commonly present in genetically engineered feed crops like corn and soybeans, are entering poultry production systems and impacting bird health.

Scientists identify glyphosate and its metabolite, aminomethylphosphonic acid (AMPA), as causes of sublethal yet debilitating effects in chickens.

These include gut microbiome disruption, gastrointestinal disease, reduced reproductive health, liver and kidney toxicity, growth defects, endocrine disruption, oxidative stress, and weakened immunity. The review warns that these impacts extend far beyond immediate mortality.

Residues of glyphosate and AMPA have been detected not only in feed but also in soil, water, and eggs sold in grocery stores.

Researchers emphasize that glyphosate-based herbicides (GBHs) often contain additional ingredients, such as polyethoxylated tallow amine (POEA), which increase toxicity and can damage embryonic and placental cells.

Key findings show glyphosate exposure causes oxidative stress in poultry, damaging DNA, proteins, and lipids. Studies further link glyphosate to gastrointestinal toxicity by interfering with vital enzymes, impairing nutrient metabolism, and altering intestinal structures.

Reproductive effects include reduced sperm quality in roosters, altered egg development, weaker eggshells, and embryo mortality. Glyphosate residues have also been associated with diminished hatchability and overall productivity in poultry.

The review criticizes current regulatory processes for failing to account for cumulative, long-term, and synergistic effects of glyphosate and co-formulants. Authors stress the need for comprehensive risk assessments and point to organic agriculture as a safer, sustainable solution.

Organic poultry production avoids glyphosate exposure, strengthens soil and ecosystem health, and reduces risks of antibiotic-resistant bacteria and foodborne pathogens.

As glyphosate remains one of the most widely used herbicides in global agriculture, the findings underscore the urgent need for stronger regulation and adoption of safer farming practices to protect animal, human, and environmental health.

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