Glyphosate: How It Works & Gut Microbiome Risks

Bianka Rainbow
Dec 3, 2025
2 min read

Glyphosate Explained: How It Works in Plants & What It Means for Your Health

Meta Description:

Discover how glyphosate works inside plants, how it enters the human body, its effects on gut bacteria, and the latest health concerns and regulatory insights. A clear, science-based breakdown of one of the world’s most controversial herbicides.

🔍 Curious About Glyphosate?

You’re not alone — glyphosate is the world’s most widely used herbicide, yet most people don’t actually know how it works, why it’s so controversial, or what it may be doing inside the human body. Here’s a simple, science-based breakdown.

🌱 How Glyphosate Works in Plants

Targets the Shikimic Acid Pathway

Glyphosate blocks a plant’s ability to grow by inhibiting a key metabolic route called the shikimic acid pathway — a pathway essential for plants and many microorganisms, but not found in human cells.

Blocks the EPSPS Enzyme

It specifically inhibits an enzyme called 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS).This enzyme helps plants create aromatic amino acids needed for survival. Without those amino acids → plants weaken → stop growing → die.

🚶‍♂️ How Glyphosate Interacts With the Human Body

Absorption

Humans may absorb glyphosate through:

The GI tract if consumed through contaminated food
The skin, if exposed through products or environmental contact

Metabolism & Excretion

The human body does not metabolize glyphosate. It passes through the system and is excreted mostly unchanged in the urine.

Impact on Gut Microbiota

Even though humans don’t use the shikimate pathway, our gut bacteria DO — and glyphosate may disrupt them. This could influence:

Digestion
Immune function
Inflammatory responses

Research is ongoing, but microbial disruption is one of the biggest concerns among scientists.

⚠️ Health Concerns to Consider

Carcinogenicity

Some organizations classify glyphosate as a probable carcinogen, especially linked to non-Hodgkin lymphoma, though the global scientific community is still debating the strength of this link.

Other Potential Effects

Emerging research suggests possible roles in:

Endocrine disruption
Developmental effects
Impacts on gut bacteria
Promoting antibiotic resistance

None of these are fully settled, but they’re being actively studied.

🌍 Regulation Around the World

Different countries handle glyphosate very differently:

Some enforce strict maximum residue limits in food
Some have banned or restricted its use entirely
Others continue widespread use under “safe” exposure guidelines

The conversation around glyphosate is evolving fast as new research emerges.