Glyphosate is the most widely used herbicide in modern agriculture and there’s a high probability it’s already in your body.

In this episode of The Dr. Kumar Discovery, Dr. Ravi Kumar takes a deep, evidence-based look at glyphosate, moving beyond headlines to examine its chemistry, history, biological mechanisms, and the growing debate around its safety.

The conversation begins with the fundamentals. Glyphosate works by blocking the shikimate pathway, a biological system plants use to produce essential amino acids. Because humans don’t possess this pathway, glyphosate was long considered biologically harmless to us.

But that assumption is now being challenged. While human cells lack the shikimate pathway, the bacteria in our gut microbiome rely on it. Dr. Kumar explains how glyphosate exposure may disrupt gut bacteria, potentially altering the production of amino acids like tryptophan, which plays a key role in neurotransmitter synthesis and overall metabolic health.

The episode then traces glyphosate’s rise, from a shelved chemical compound in the 1950s to a dominant agricultural tool after the introduction of genetically modified, glyphosate-resistant crops in the 1990s. Today, its use is deeply embedded in global food systems, with two major exposure pathways: direct application on GMO crops and pre-harvest desiccation on non-GMO grains like oats and wheat.

Dr. Kumar reviews data showing widespread presence of glyphosate residues in food and human biological samples, highlighting how modern dietary patterns may contribute to chronic low-level exposure.

From there, the discussion turns to health effects and scientific controversy. Regulatory agencies such as the EPA and EFSA classify glyphosate as unlikely to cause cancer when used as directed. In contrast, the World Health Organization’s cancer research arm classifies it as “probably carcinogenic,” based on evidence including links to non-Hodgkin lymphoma.

Dr. Kumar also examines the broader context - legal settlements, conflicting regulatory conclusions, and the economic dependence of modern agriculture on glyphosate. A recent U.S. policy decision to expand glyphosate production under the Defense Production Act underscores how public health, food security, and industry interests can collide.

The episode concludes with a practical framework. Rather than prescribing action, Dr. Kumar outlines ways individuals can reduce exposure, such as prioritizing organic foods for high-risk crops, reducing processed food intake, filtering water, and diversifying dietary sources.

What You’ll Learn:

• What glyphosate is and how it works at a biochemical level
• Why it was originally considered safe and why that assumption is being challenged
• How glyphosate may disrupt the gut microbiome via the shikimate pathway
• The two primary ways glyphosate enters the food supply, including pre-harvest desiccation
• What current research says about links to cancer, endocrine disruption, and metabolic health
• Why regulatory agencies disagree on glyphosate’s safety profile
• How modern agriculture became dependent on glyphosate-based systems
• Practical strategies to reduce exposure through diet and lifestyle choices

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Episode Highlights:

[00:00:00] Intro

[00:01:12] What Glyphosate Is And How It Enters The Human Body

[00:03:50] The Biology Of Glyphosate And Its Impact On The Gut Microbiome

[00:05:21] The Surprising History Of Glyphosate From Chemical To Herbicide

[00:07:15] How Glyphosate Enters The Food Supply Through Crops And Desiccation

[00:10:13] The Science Debate: Cancer Risk, Microbiome, And Health Effects

[00:17:40] Government Policy, Personal Risk, And How To Reduce Exposure

[00:23:07] Practical Steps To Reduce Glyphosate Exposure And Final Takeaways

Episode Resources:

• Dr. Ravi Kumar’s Website
• Dr. Ravi Kumar on LinkedIn