Glyphosate and the Hidden Cost of Chemical Exposure

Glyphosate is one of the most widely used herbicides in the world, best known as the active ingredient in Roundup. It is often discussed as an agricultural chemical, but the deeper concern is what repeated exposure may be doing inside the human body.

In May 2015, the World Health Organization classified glyphosate as “probably carcinogenic to humans.” This classification was based in part on animal studies showing that glyphosate exposure was associated with tumor growth and higher incidents of cancer.

The WHO investigation also found that glyphosate is probably genotoxic, meaning it may contribute to mutations in DNA. It was also associated with increased oxidative stress, which can trigger inflammation and accelerate biological aging.

That matters because oxidative stress is not a small issue. When the body is exposed to more oxidative stress than it can manage, cells, mitochondria, proteins, and DNA can become damaged. Over time, that kind of stress can contribute to inflammation, tissue dysfunction, and premature decline.

Glyphosate may also interfere with hormone signaling. Research has shown that glyphosate can mimic estrogen, which may help explain why it has been shown to cause human breast cancer cells to grow in vitro.¹

The concern does not stop with glyphosate alone. Roundup itself may be more harmful than glyphosate by itself. Research has found that Roundup is directly toxic to mitochondria, and some research suggests it may be even more toxic to human placental cells than glyphosate alone.² ³

This distinction matters because people are rarely exposed to glyphosate in isolation. They are often exposed to commercial formulations that include glyphosate along with other chemical ingredients. The full formulation may affect the body differently than the active ingredient by itself.

The mitochondrial concern is especially important. Mitochondria are responsible for producing cellular energy. When mitochondria are damaged, the effects can reach far beyond one isolated system. Energy production, inflammation control, detoxification, hormone function, and overall cellular resilience can all be affected.

There is also a more unusual concern involving glycine.

The “gly” in glyphosate refers to glycine, an amino acid that is highly prevalent in collagen, the main structural protein in skin and connective tissue. Chemically, glyphosate is a glycine molecule attached to a methylphosphonyl group.

One proposed concern is that when glyphosate is consumed, it may be incorporated into the collagen matrix in place of glycine. If this occurs, it could interfere with the structure and function of proteins that depend on glycine.

In 2018, researchers Stephanie Seneff and Laura Orlando published a paper proposing that glyphosate substitution for glycine during protein synthesis may disrupt proteins necessary for kidney health and may contribute to kidney disease.⁴

This theory is controversial, but it raises an important question: what happens when a synthetic chemical resembles a biological building block closely enough to interfere with normal function?

That is the larger issue with glyphosate. The concern is not only whether it is acutely toxic. The concern is whether chronic exposure may create subtle biological disruptions over time through oxidative stress, mitochondrial dysfunction, hormone mimicry, DNA damage, protein disruption, and microbiome effects.

Glyphosate is not just a farming issue. It is a human biology issue.

If a chemical can influence mitochondria, oxidative stress, DNA integrity, estrogen signaling, placental cells, collagen structure, and kidney-related proteins, then it deserves more attention than it usually receives.

This does not mean every health problem can be blamed on glyphosate. It does not mean one exposure automatically causes disease. But it does mean glyphosate should not be treated as harmless simply because it is common.

Common exposure is not the same thing as safe exposure.

The body is constantly interacting with the environment. Food, water, air, light, chemicals, stress, and nutrients all become part of the biological context in which health or dysfunction develops. Glyphosate belongs in that conversation because it may interfere with several systems that are essential for long-term health.

The more we understand about chemical exposure, the clearer it becomes that health is not only about what we intentionally put into the body. It is also about what we are exposed to without thinking.

Reducing glyphosate exposure may be one practical step toward lowering the chemical burden placed on the body. That can mean choosing organic foods when possible, washing produce, being mindful of foods most likely to contain herbicide residues, and understanding that the quality of the food supply matters.

Glyphosate may be invisible in the meal, but that does not mean it is irrelevant.

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References

1. Thongprakaisang, Siriporn, et al. “Glyphosate Induces Human Breast Cancer Cells Growth via Estrogen Receptors.” Food and Chemical Toxicology 59, September 2013, 129-136. https://doi.org/10.1016/j.fct.2013.05.057

2. Peixoto, Francisco. “Comparative Effects of the Roundup and Glyphosate on Mitochondrial Oxidative Phosphorylation.” Chemosphere 61, no. 8, December 2005, 1115-1122. https://doi.org/10.1016/j.chemosphere.2005.03.044

3. Samsel, Anthony, and Stephanie Seneff. “Glyphosate, Pathways to Modern Diseases IV: Cancer and Related Pathologies.” Journal of Biological Physics and Chemistry 15, 2015, 121-159. https://doi.org/10.4024/11SA15R.jbpc.15.03

4. Seneff, Stephanie, and Laura F. Orlando. “Glyphosate Substitution for Glycine During Protein Synthesis as a Causal Factor in Mesoamerican Nephropathy.” Journal of Environmental & Analytical Toxicology 8, no. 1, 2018, 541. https://doi.org/10.4172/2161-0525.1000541

Sugar Is Bad for Your Brain

Sugar is usually discussed in the context of weight gain, blood sugar, or diabetes, but its effects go much deeper than that. Sugar also has consequences for the brain, partly because the brain depends heavily on energy metabolism, mitochondrial function, neurotransmitter signaling, and inflammation control.

Scientists have known there is a relationship between sugar and cellular energy production for a long time. In 1927, biochemist Herbert Crabtree discovered that elevated glucose levels could lower mitochondrial function. This matters because mitochondria are responsible for producing the energy our cells rely on to function properly.

When mitochondrial function is impaired, the issue is not only about energy. Mitochondria are involved in cellular health, oxidative stress, inflammation, and the way tissues throughout the body respond to metabolic stress. Since the brain is one of the most energy-demanding organs in the body, anything that negatively affects mitochondrial function has the potential to affect brain health.

Sugar has also been shown to decrease the number of dopamine receptors in the brain. Dopamine is closely tied to motivation, reward, pleasure, drive, and reinforcement. When dopamine signaling is altered, it can affect how the brain responds to food, reward, and repeated exposure to highly palatable foods.

This is one reason sugar can be so difficult for people to moderate. The issue is not only that sugar tastes good. It also interacts with the brain’s reward system in a way that can influence cravings, habits, and the desire to keep consuming more.

While all forms of sugar can become a problem when consumed excessively, fructose appears to be especially concerning. Fructose is found in fruit, high-fructose corn syrup, and agave nectar. The context matters, though. Eating moderate amounts of whole, seasonal fruit is very different from consuming large amounts of fructose through fruit juice, sweetened beverages, processed foods, high-fructose corn syrup, or agave nectar.

Fructose can contribute to oxidative stress and may also feed less beneficial bacteria in the gut, which can promote inflammation. That matters because the gut and brain are not separate systems. Inflammation that begins in the gut can influence the rest of the body, including the brain.

Fructose has also been implicated in damaging mitochondria in skeletal muscle cells, harming the mitochondrial membrane, and impairing cellular respiration and energy metabolism. In simple terms, excessive fructose may interfere with the body’s ability to produce energy efficiently at the cellular level.

The brain will usually tolerate moderate amounts of whole fruit, especially when that fruit is seasonal and eaten in its natural form. Whole fruit comes packaged with water, fiber, micronutrients, and other compounds that slow down absorption and make overconsumption less likely.

Fruit juice is different. High-fructose corn syrup is different. Agave nectar is different. These sources make it much easier to consume large amounts of fructose without the same natural limits that come with eating whole fruit.

For that reason, a practical approach is to avoid excessive fructose intake, completely stay away from fruit juice, and avoid foods that contain high-fructose corn syrup or agave nectar.

A reasonable target is to limit fructose intake to about 20 grams per day.

This does not mean fruit is the enemy. It means the form, dose, and context matter. Whole fruit in moderate amounts is not the same thing as drinking fruit juice or consuming processed foods sweetened with concentrated fructose sources.

Sugar affects more than body weight. It can influence mitochondrial function, dopamine signaling, oxidative stress, gut health, inflammation, and energy metabolism. Since all of those systems matter for the brain, sugar is not something we should think about only through the lens of calories.

If the goal is better brain health, better energy, and better metabolic function, reducing excess sugar, especially concentrated fructose, is one of the simplest places to start.

Alternative Energy Creation

For most of the history of biology, plants and animals have been thought of in two separate categories: autotrophs and heterotrophs.

Autotrophs are organisms that provide their own food sources. Plants do this by capturing sunlight and using a process called photosynthesis, where carbon dioxide and water are converted into carbohydrates and oxygen.

Carbon dioxide + Water → Carbohydrates + Oxygen

Heterotrophs are organisms that consume other organisms for food. Whether animals are herbivores, omnivores, or carnivores, they are eating other organisms to acquire energy.

For most of biology, this has been the general framework. Plants make their own energy from sunlight. Animals consume plants, animals, or both to get the energy they need. However, there are exceptions that have been called photoheterotrophs or mixotrophs.

Most corals, for example, can both synthesize energy from sunlight and consume organisms like plankton. The Venus flytrap, along with other insect-eating plants, can derive energy from sunlight and from the organisms they consume. Other examples include certain types of non-sulfur bacteria, heliobacteria, many types of plankton, and even some insects.

Humans, however, have generally been understood as purely heterotrophic. We need to eat plants and animals of various kinds to get our energy.

That may still be true in the most basic sense, but research into light, mitochondria, and cellular energy production adds an interesting layer to the conversation.

Hundreds of studies have found that human cells, specifically the mitochondria inside our cells, can produce more ATP when exposed to red and near-infrared light. ATP, or adenosine triphosphate, is the primary energy currency of the cell.

The research goes even further than that. A study published in the Journal of Cell Science found that other organisms, including mammals that are biologically similar to humans, such as rodents and pigs, were shown to be capable of taking up chlorophyll metabolites into their mitochondria. Those metabolites were then able to help capture sunlight energy and amplify cellular energy production. The study was titled “Light-harvesting chlorophyll pigments enable mammalian mitochondria to capture photonic energy and produce ATP.”

The research suggests that some animals can use these chlorophyll metabolites to speed up the rate of energy production and increase the overall volume of ATP produced by fairly large amounts in many cases.

Here is a key passage from the abstract of that study:

“Sunlight is the most abundant energy source on this planet. However, the ability to convert sunlight into biological energy in the form of adenosine-5′-triphosphate (ATP) is thought to be limited to chlorophyll-containing chloroplasts in photosynthetic organisms. Here we show that mammalian mitochondria can also capture light and synthesize ATP when mixed with a light-capturing metabolite of chlorophyll.”

This does not mean humans are plants, and it does not mean food is unnecessary. Humans still acquire energy primarily by consuming food. However, the research does suggest that our relationship with light may be more biologically meaningful than the traditional autotroph-versus-heterotroph model makes it seem.

Another related paper, “Light Effect on Water Viscosity: Implication for ATP Biosynthesis,” explored how near-infrared light may influence ATP synthesis through effects on intramitochondrial water viscosity. The authors proposed a physicochemical mechanism that could help explain why non-destructive levels of near-infrared light have been associated with increases in ATP synthesis.

Taken together, these findings point toward a broader idea: light may play a more direct role in cellular energy production than previously assumed.

For most of biology, we have drawn a clear line between organisms that make energy from sunlight and organisms that must consume other organisms for energy. That distinction is still useful, but it may not tell the whole story. Some organisms clearly blur that line, and research into mammalian mitochondria suggests there may be more overlap than once believed.

At minimum, this research gives us a reason to think more carefully about sunlight, red light, near-infrared light, chlorophyll metabolites, mitochondria, and ATP production. Energy creation in biology may not be as simple as plants make energy from light and animals get energy only from food.

The body may be more responsive to light than the older model allowed us to see.

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References

Xu, C., Zhang, J., Mihai, D. M., & Washington, I. “Light-harvesting chlorophyll pigments enable mammalian mitochondria to capture photonic energy and produce ATP.” Journal of Cell Science 127, no. 2, 388–399, 2014. https://doi.org/10.1242/jcs.134262

Sommer, A. P., Haddad, M. K., & Fecht, H. J. “Light Effect on Water Viscosity: Implication for ATP Biosynthesis.” Scientific Reports 5, 12029, 2015. https://doi.org/10.1038/srep12029

Oxidation, Reduction, and Redox: A Simple Overview

Over the last two or three decades, you may have heard marketers and wellness coaches talk about free radicals, antioxidants, health, and longevity. These ideas all belong to the larger oxidation-reduction cycle, which is part of the emerging field often called oxidative medicine, oxidative science, or, more commonly now, redox biology.

At the simplest level, oxidation and reduction describe the exchange of electrons.

Electrons are negatively charged. When electrons are removed through oxidation, the molecule becomes more positively charged and more acidic. When electrons are added through reduction, or antioxidant activity, the opposite happens. The molecule becomes more negatively charged and more alkaline.

This matters because many pathogens, toxins, and free radicals are more comfortable in positively charged, acidic environments. Antioxidant activity helps counter those threats by donating electrons, increasing negative charge, and supporting a more balanced internal environment.

Oxidation

Oxidation is the stealing or removal of electrons from a molecule. Molecules that tend to oxidize other substances are called oxidants.

A simple example is rust. When oxygen slowly takes electrons from iron, the iron oxidizes, and we see that process as rust. When something burns or explodes in the presence of oxygen, that is also oxidation, just happening much more rapidly.

In biological systems, oxidation can destabilize matter inside cells by stealing electrons. When molecules lose electrons, they become unstable and reactive unless they can find another electron to pair with and balance their charge.

This is one reason oxidants can be useful. The immune system uses oxidants as powerful antimicrobial and detoxifying agents. Most oxidants are oxygen-based molecules, which is why they are called reactive oxygen species, or ROS. Nitrogen and sulfur can also form their own reactive species, although they are less commonly discussed.

Some of the best-known oxidants in the functional medicine field include oxygen, hydrogen peroxide, ozone, and chlorine dioxide.

Free Radicals

A free radical is created when a molecule with a balanced pair of electrons loses one of those electrons through oxidation. The resulting molecule has an unpaired electron, which makes it highly reactive and potentially damaging to cells.

This is why the public was taught to fear free radicals throughout the 1980s, 1990s, and 2000s. Free radicals can damage cells, which is why antioxidants became so widely promoted as a way to fight free radical damage.

But the full story is more nuanced. Free radicals and reactive oxygen species are not always bad. They can be damaging when uncontrolled, but they also play important roles in immune defense, detoxification, and cellular signaling.

Reduction

Reduction is the opposite of oxidation. It is the giving of electrons, or a decrease in the state of oxidation.

Molecules that give up electrons in chemical reactions are called reductants, even though that may sound backwards. They may also be called reduced species, or RS.

Antioxidants help balance this system. They act as small molecular catalysts that help oxidants give their extra electrons to reductants, neutralizing both electrical charge and biological reactivity.

The body’s own antioxidants, such as glutathione, can perform tens of millions of these reactions per minute. After these reactions occur, reactive oxygen species and reductants can turn back into salt water, which is where they came from in the first place.

Redox

Not too long ago, scientists began using the term redox as a shorter way to describe oxidation-reduction processes. Redox is simply short for reduction-oxidation.

Instead of repeatedly saying oxidation, reduction, reactive oxygen species, and reductants, the field began using redox as an umbrella term. That is where phrases like redox molecules, redox reactions, and redox signaling molecules come from.

Reactive oxygen species and reduced species are collectively called redox molecules or redox signaling molecules.

These redox molecules are by-products of metabolism. Mitochondria use them to support cells in many ways, and bacteria use them to support the microbiome.

Mitochondrial Redox Molecules

Mitochondria produce energy by burning fat or sugar in the presence of oxygen to make ATP, the main energy currency of the cell. This process is essentially metabolism, but instead of the concentrated heat of a conventional fire, the mitochondria perform this process inside the cell.

As mitochondria produce ATP, they also produce oxygen-based redox molecules as by-products.

These mitochondrial redox molecules are made primarily of oxygen and help form the communication network between mitochondria and human cells. Aerobic exercise dramatically increases the need for this process because it increases the body’s demand for energy.

Bacterial Redox Molecules

Bacteria also produce redox molecules.

When bacteria metabolize food, they create their own variety of redox molecules as by-products. These are different from mitochondrial redox molecules because they are made primarily of carbon.

Each carbon-based bacterial redox molecule may have around 17 potential binding sites, which represents its signaling capacity. Since there are tens of thousands of bacterial species, and each species can produce roughly 10 to 15 different varieties of these redox molecules, the signaling potential becomes enormous.

This is one reason the microbiome is so biologically important. Bacteria are not just passive organisms living inside the body. Through metabolism and redox signaling, they participate in communication, regulation, and the body’s internal ecology.

Oxidative Stress

Oxidative stress refers to the amount of time and degree to which oxidants outnumber reductants.

Oxidative stress can become damaging when the body does not have enough antioxidants and reductants available to neutralize oxidants. This is especially true when oxidative stress becomes chronic and uncontrolled.

However, oxidative stress is not always bad. It can be beneficial when used therapeutically and in the right context. The problem is not oxidation itself. The problem is uncontrolled oxidation without the proper balancing forces.

Tight Junctions

Tight junctions are the filaments that normally hold the cells of our membranes together. Their job is to keep unwanted substances out while still allowing authorized substances to pass through when needed.

When tight junctions are healthy, they open and close on demand. But when tight junctions become damaged, they can remain open and allow unauthorized substances to pass through. This can create many different health problems because substances that should have remained outside certain tissues or membranes are allowed to enter.

This is another reason redox balance matters. The body depends on controlled communication, proper barrier function, and the ability to regulate what enters and leaves different spaces.

The Bigger Picture

Oxidation and reduction are not abstract chemistry terms. They describe one of the most important balancing systems in the body.

Oxidants can damage cells when uncontrolled, but they also support immune defense and detoxification. Antioxidants and reductants help balance oxidants by donating electrons. Mitochondria and bacteria both produce redox molecules as by-products of metabolism. These redox molecules help cells, mitochondria, and the microbiome communicate.

The goal is not to eliminate oxidation. The goal is balance.

Too much uncontrolled oxidation creates stress and damage. Too little oxidative activity would impair immune defense, detoxification, and signaling. Health depends on the body’s ability to manage both sides of the redox cycle.

That is why redox biology matters. It gives us a better way to understand energy production, oxidative stress, inflammation, detoxification, immune function, mitochondrial communication, microbiome signaling, and cellular health.