Watchman News

1 What is glyphosate’s primary role in conventional agriculture?

Killing weeds by disrupting plant growth pathways
Glyphosate is a broad-spectrum herbicide designed to kill plants by blocking a metabolic process essential for their growth. Learn more.
Preventing insect infestations in crops
Increasing the vitamin content of grains
Speeding up seed germination in organic farms

2 What is a risk of excess high-intensity exercise?

Sleep quality may suffer because of extra energy
Metabolism may slow down, depending on genetics
Social anxiety may worsen especially for younger people
Mitochondria and glucose control get disrupted
Extreme training can shut down mitochondria and disrupt blood sugar control. Learn more.

3 What mainly changes in your brain after lots of short-form video exposure?

Language skills and creativity
Sense of humor and optimism
Impulse control and stress regulation
Short-form video habits can also affect your attention aside from your self-control, and how your brain regulates stress. Learn more.
Hand-eye coordination and reflexes

4 How long does it take to see improvements in liver health from regular exercise?

Within one to two weeks of starting activity
After several years of consistent training
Only once major weight loss occurs
Within eight to 12 weeks of consistent exercise
Studies show liver fat reduction usually appears within eight to 12 weeks, while programs lasting six months or longer deliver stronger, longer-lasting metabolic benefits. Learn more.

5 Which factor receives little research funding despite being a major driver of heart disease risk?

Genetic cholesterol disorders
Environmental and endothelial damage
Pollution, lead exposure, chronic stress, and vessel damage drive heart disease risk but attract little funding because they cannot be patented or monetized like drugs. Learn more.
Dietary cholesterol intake and monitoring
Optimal statin dosing strategies

6 Why did Europe release its first clinical guide for photobiomodulation (PBM) in cancer care?

To standardize supportive light-based care in oncology
A clinical guide provides consistent treatment standards, making it easier for cancer centers to use PBM safely and effectively across Europe. Learn more.
To replace chemotherapy with light-based treatments
To limit PBM use to experimental research only
To regulate cosmetic light therapy clinics

7 Where does Big Food concentrate much of its marketing?

Whole food co-ops and local markets
Concentrated animal feeding operations (CAFOs)
Ultraprocessed foods aimed at children
Big Food targets children by marketing ultraprocessed snacks as fun, normalizing poor nutrition early. Learn more.
Public health clinics and nutritionists

Test Your Knowledge with
The Master Level Quiz

1 Why should regulatory claims about glyphosate safety be questioned?

Key studies with secret industry backing were retracted
Confidence in glyphosate safety is weakened when key studies are retracted for ethical reasons and hidden industry ties. Learn more.
Regulators have banned all research on glyphosate for profit motives
Organic farmers control most of the published studies
Safety claims are based only on animal testing and not human consumption

2 Why is it hard to get much thymoquinone from black cumin seed oil?

The oil is hard to find
Thymoquinone is destroyed by cooking
There’s very little thymoquinone in the oil
Thymoquinone is the main beneficial compound in black cumin seed oil, but only tiny amounts are present in the oil. Learn more.
Most brands add sugar, which disrupts the chemical makeup

3 What is one effective way to reduce glyphosate exposure?

Choosing organic or regeneratively farmed foods
Eating organic or regeneratively farmed foods helps lower glyphosate exposure by avoiding crops treated with herbicides. Learn more.
Rinsing all produce with hot water to remove residue
Avoiding all fresh fruits and vegetables sold in grocery stores
Taking daily vitamin supplements to increase antioxidant effectiveness

4 Which activity is most reliable for long-term brain health?

Heavy weightlifting
Daily sprint intervals
Marathon training
Regular moderate walking
Moderate, consistent walking is linked to slower brain decline and fewer metabolic problems. Learn more.

5 Which is a recommended way to avoid per- and polyfluoroalkyl substances (PFAS) in cosmetics?

Check labels for “perfluoro-” or “polyfluoro-”
Checking for “perfluoro-” or “polyfluoro-” on labels is the most direct way to avoid per- and polyfluoroalkyl substances (PFAS) in cosmetics. Learn more.
Choose only fragrance-free beauty products
Wash your face more often with cold water
Buy products labeled “hypoallergenic”

6 What opportunistic pathogen often rises in the gut after a colonoscopy?

Bacteroides
Lactobacillus
Firmicutes
Proteobacteria
Proteobacteria thrive when the gut is disrupted, quickly taking advantage of higher oxygen and stress after procedures like colonoscopies. Learn more.

7 Which approach is most effective for rebuilding focus?

Relying on willpower alone
Ignoring phone use and multitasking
Creating focus blocks
Changing your environment and setting daily focus periods helps restore attention better than relying on willpower. Learn more.
Taking daily memory supplements

8 Why do vision problems often appear before heart symptoms?

Large arteries handle stress longer than small vessels in the body
Eyesight conditions need more time to develop than chest pain
Heart and eye symptoms always appear together
Small eye vessels show damage from poor blood flow sooner
Tiny blood vessels in the eyes are affected by poor circulation before larger heart arteries show problems. Learn more.

9 How many Americans are affected by Type 2 diabetes?

Fewer than 5 million
About 8 million
Nearly 18 million
Over 38 million
More than 38 million Americans have Type 2 diabetes, and the number keeps rising. Learn more.

10 Which combination of exercise produces the strongest improvements for fatty liver disease?

Stretching, flexibility exercises, and some calisthenics
Aerobic exercise combined with resistance training
Combining aerobic and resistance exercise improves fat burning, insulin signaling, and blood sugar regulation more effectively than either exercise type alone. Learn more.
Resistance training without cardiovascular activity
Light walking performed a few times per week

11 Which kind of fat is most strongly linked to low vitamin D levels?

Visceral fat
Visceral fat, stored deep around organs, has the strongest association with low vitamin D levels. Learn more.
Subcutaneous fat
Fatty acids
Neck fat

12 Which neurotransmitter helps with memory, attention, learning, and emotional regulation?

Dopamine
Acetylcholine
Acetylcholine supports memory, attention, learning, and mood by helping nerve cells communicate. Learn more.
Serotonin
GABA

13 Which substance found in plaques explains why clots resist breaking down?

Low-density lipoprotein (LDL) or bad cholesterol
Red blood cells
Lipoprotein A
Lipoprotein A helps patch artery damage but makes clots harder to dissolve, promoting plaque buildup and raising heart attack risk. Learn more.
Dietary fats

14 Which of these isn’t released by microbes from fermented foods?

Acids
Enzymes
Metabolites
Hormones
Fermented food microbes release acids, enzymes, and metabolites — but not hormones — when passing through your gut. Learn more.

15 What role does brain-derived neurotrophic factor (BDNF) play in mental health?

It slows down brain development in childhood
It raises stress hormones during anxiety
It blocks new connections between brain cells
It supports learning, mood stability, and stress resilience
BDNF helps brain cells grow and connect, promoting learning, stable mood, and the ability to handle stress. Learn more.

16 Which cancer-related complications have the strongest clinical support for photobiomodulation (PBM)?

Fatigue and nausea from chemotherapy
Oral mucositis and radiation-related skin damage
Clinical research shows PBM is especially helpful for easing pain and healing mouth sores and skin reactions caused by cancer treatment. Learn more.
Hair loss and immune suppression
Infection risk and blood cell loss

17 What hormone is commonly known as the “bonding hormone”?

Oxytocin
Oxytocin is called the “bonding hormone” because it promotes connection and lowers stress. Learn more.
Cortisol
Insulin
Adrenaline

18 What happens to the brain when someone has long-term high blood pressure?

Attention and learning get a measurable boost
More oxygen reaches all brain regions over time
Blood flow drops and memory-related areas shrink
Long-term high blood pressure reduces brain blood flow and shrinks areas critical for memory, focus, and decision-making. Learn more.
Nerves controlling relaxation become more active

19 Which of the following is not considered a real food alternative to Big Food?

EatWild.com and Local Harvest
Digital farmers market platforms
Pasture-based meat and raw dairy
National frozen meal distribution centers
Industrial frozen meal brands reflect Big Food’s model, unlike small-scale, regenerative, or farm-direct options. Learn more.

20 Overconsumption of which type of oil poses a major threat to mitochondrial and skin health?

Seed oils high in omega-6 fatty acids
Omega-6-rich seed oils impair mitochondrial energy production and increase vulnerability to sun-related skin damage when consumed in excess. Learn more.
Olive oil high in monounsaturated fats
Fish oil rich in omega-3 fatty acids
Coconut oil high in saturated fats

21 How many daily grams (g) of carbohydrates helps maintain metabolic health?

50 g
100 g
250 g
Around 250 g of carbohydrates daily supports thyroid function and lowers stress hormones, while overly low-carb intake raises cortisol and strains metabolism. Learn more.
400 g

Aspartame, the artificial sweetener used in everything from diet soda to chewable vitamins, doesn’t just sweeten your food — it alters your genetic landscape and heightens your risk of glioblastoma, one of the deadliest forms of brain cancer, according to a new study.

What’s even more concerning is that these genetic shifts were traced back to disruptions in gut bacteria. If you still believe the claims that aspartame is “harmless,” these new findings will open your eyes to just how dangerous this widely used additive is.

Aspartame Activates Brain Cancer Genes, Study Finds

A recent animal study published in Scientific Reports investigated the effects of aspartame on gene expression and gut bacteria in mice with glioblastoma. Researchers assessed whether aspartame could influence tumor progression on a molecular level, even in the absence of visible tumor growth.1

• The mice used in the study had gliomas induced by transplanting cancerous cells — These test subjects were then split into two groups. One received aspartame in their drinking water, while the control group was given plain water.

• One of the most striking findings was the activation of cancer-linked genes — The researchers discovered dramatic internal changes — particularly at the genetic and microbial level — in the aspartame-exposed group. Specifically, they observed a significant upregulation of three key genes — myelocytomatosis (MYC), cyclin-dependent kinase inhibitor 1A (CDKN1A), and transforming growth factor-β (TGFB1).

• These three genes are well-established contributors to cancer progression — MYC is an oncogene, meaning it plays a direct role in driving uncontrolled cell growth, while TGFB1 is often associated with a poor prognosis in glioblastoma due to its ability to suppress immune function and promote tumor cell survival. CDKN1A is typically involved in controlling the cell cycle, but when dysregulated, it contributes to tumor aggressiveness.

• The most unsettling part? These changes happened without any measurable increase in tumor size. That means even if your tumor isn’t growing, it could still be genetically evolving into something far more dangerous.

Aspartame Alters Your Gut Microbiota by Affecting the Gut-Brain Axis

Aspartame was accidentally discovered in 1965 and had been used in consumer products since the 1980s. Being a low-calorie sweetener that’s 200 times sweeter than regular sugar, it became widely popular among people who want to cut back on their calorie consumption. It’s now used in over 6,000 different products worldwide, including diet soda, sugar-free gum and candy, and even condiments like ketchup and salad dressings.2

However, aspartame is not as safe as it seems — in fact, it has been associated with a long list of health problems, such as obesity, headaches, and depression.3 In 2023, the World Health Organization’s International Agency for Research on Cancer (IARC) declared aspartame as possibly carcinogenic to humans4 — and now, this animal study provides stronger evidence backing up this classification.

• The changes in gene activity were traced to a powerful biological process called RNA methylation — These changes occurred specifically along the N6-methyladenosine (m6A) pathway. RNA methylation is a chemical modification of messenger RNA (mRNA), the molecule your body uses to translate DNA into proteins.
This modification acts like a dimmer switch — it fine-tunes how active a gene becomes. When aspartame exposure elevated this process, the dimmer switch turned all the way up on cancer-promoting genes.

• Aspartame increases glioblastoma risk by affecting the gut-brain axis — This is the bidirectional pathway by which your gut and brain communicate with each other. Your gut bacteria synthesize short-chain fatty acids (SCFAs) like butyrate and metabolize dietary components like tryptophan into molecules that regulate the tumor microenvironment.
When these metabolites reach tumor sites, they improve immune surveillance mechanisms and alter cellular metabolic processes to inhibit tumor growth.

• Conversely, tumors also influence gut microbial composition — Certain gut bacteria that colonize tumor tissues contribute to carcinogenesis through multiple mechanisms — they induce DNA damage, suppress the immune system’s ability to recognize tumor antigens, and disrupt vital metabolic pathways. These create conditions conducive to tumor survival and proliferation.

To put it simply, some gut bacteria produce substances that help fight cancer, while others actually help tumors grow and spread; Aspartame alters your gut to increase the growth of tumor-spreading bacteria.

• Mice fed aspartame had a significant drop in bacteria from the Rikenellaceae family — Rikenellaceae are part of a group of microbes involved in producing SCFAs, which, as mentioned above, help inhibit cancer formation. According to the study authors:

“The composition and abundance of gut microbiota, particularly the Rikenellaceae family, are closely associated with the levels of volatile fatty acids, such as acetic acid, propionic acid, and butyric acid.
Numerous findings have provided compelling evidence of a robust connection between the abundance of the Rikenellaceae family in the gut and a diverse array of metabolic health conditions, including Parkinson’s disease and nonalcoholic fatty liver disease (NAFLD).

Our study concluded that although the aspartame diet did not significantly affect tumor growth, it did induce changes in the composition of the gut microbiota, particularly a decrease in the relative abundance of the Rikenellaceae family. We speculated that gut microbiota could influence the progression of glioblastoma multiforme by gut-brain axis.”5

Previous Studies Have Associated Artificial Sweeteners with a High Risk of Cancer

There’s no doubt in my mind that artificial sweeteners like aspartame are among the most pernicious ingredients to ever make into our food supply. On the outside, swapping sugar for aspartame seems beneficial for your health, but on the contrary, this is one of the worst decisions you can make, with damaging, life-long implications.

This featured study now adds to the growing list of research linking artificial sweeteners to cancer and tumor growth. Among the most notable ones are:

• A 2006 lifespan rat study published in Environmental Health Perspectives — The researchers note that aspartame “is a multipotential carcinogenic agent, even at a daily dose of … much less than the current acceptable daily intake.”6

• A 2010 study published in the American Journal of Industrial Medicine — The research confirms that this artificial sweetener is “a carcinogenic agent in multiple sites in rodents, and that this effect is induced in two species, rats (males and females) and mice (males).”7

• A 2012 paper published in the American Journal of Clinical Nutrition — Conducted by researchers from Harvard University, the study found a positive link between aspartame intake and Non-Hodgkin lymphoma and multiple myeloma (among males), and leukemia (in both males and females).8

• A 2022 study published in PLOS Medicine — The study found a link between aspartame and acesulfame-K, another artificial sweetener, and a higher risk of breast and obesity-related cancers.9

In 2024, the nonprofit organization U.S. Right to Know released a review highlighting multiple independent studies that linked aspartame not just to an increased risk of cancer, but to multiple health problems as well. The review notes:10

“Dozens of studies have linked the popular artificial sweetener aspartame to serious health problems, including cancer, cardiovascular disease, Alzheimer’s disease, seizures, stroke and dementia, as well as negative effects such as intestinal dysbiosis, mood disorders, headaches and migraines.

Evidence also links aspartame to weight gain, increased appetite and obesity-related diseases … This evidence raises questions about the legality of marketing aspartame-containing products as ‘diet’ drinks or weight-loss products.”

Artificial Sweeteners Disrupt Your Gut Health in Many Ways

Your gut microbiome is composed of trillions of good and bad bacteria that influence various factors, such as regulating digestion, metabolism, and immune function. However, when you consume artificial sweeteners, especially on a day-to-day basis, your gut microbiome changes. Studies have found that consuming artificial sweeteners disrupts your gut’s delicate balance, which leads to a cascade of health issues.

• Aspartame blocks a gut enzyme associated with weight management — An aspartame breakdown product called phenylalanine was found to inhibit the activity of a gut enzyme called alkaline phosphatase (IAP). Previous animal studies have associated IAP with the prevention of metabolic syndrome development, as well as reducing its symptoms in those with the condition.11

• Neotame causes serious damage to the intestines and overall gut health — A relatively new artificial sweetener that’s chemically similar to aspartame, neotame not only damaged bacteria commonly found in the gut, but also led to intestinal cell death, one study reported. This sweetener also disrupted the intestinal barrier, leading to increased leakage and decreased presence of claudin-3, a protein important for cell binding. According to the study authors:12

“The study is the first to show that neotame can cause previously healthy gut bacteria to become diseased and invade the gut wall — potentially leading to health issues including irritable bowel syndrome and sepsis — and also cause a breakdown of the epithelial barrier, which forms part of the gut wall.”13

• Consuming sucralose induces gut dysbiosis and alters glucose and insulin levels — A study published in Microorganisms found that ingesting this sweetener in amounts “far lower than the suggested ADI [acceptable daily intake]”14 — for just 10 weeks was enough to induce gut dysbiosis and alter glucose and insulin levels in healthy, young adults. The sweetener affects bacteria belonging to the phylum Firmicutes, which are involved in glucose and insulin metabolism.

If you truly value your overall health, tending to your gut health is key — and one of the most significant changes you can make is to avoid artificial sweeteners.

Eliminate Aspartame (and Other Artificial Sweeteners) from Your Life

The research is clear — Aspartame isn’t harmless. It disrupts your gut microbiome, activates genes tied to tumor aggressiveness, and hijacks your cellular energy machinery. If you want to protect your body from chronic diseases and avoid a glioblastoma diagnosis, I recommend following these strategies:

1. Cut aspartame and all artificial sweeteners from your daily intake — If you’re still drinking diet sodas or using sugar-free products like flavored waters, gum, or chewable vitamins, it’s time to stop. These are common sources of aspartame. Ideally, remove all ultraprocessed foods from your diet, as many are hidden sources of artificial sweeteners.

I also advise reading labels carefully. Aspartame and other sweeteners often hide behind other names, so make sure to closely check the label of the products you buy.

2. Switch to natural sweeteners — Raw Manuka honey, maple syrup, and coconut sugar, all consumed in moderation, are some of the best choices. If you’re trying to transition off sweeteners entirely, fresh fruit is an excellent way to satisfy your cravings while keeping your blood sugar balanced.

3. Restore your gut microbiome immediately — Focus on foods that help your body rebuild a healthy microbial balance. Start with whole fruits, well-cooked vegetables, and well-tolerated, cooked starches.

Fermented foods like sauerkraut, kefir, and kimchi provide natural probiotics that help rebalance your microbiome. Collagen-rich bone broth supports the gut lining, and dietary fiber from well-tolerated fruits helps feed beneficial bacteria (but make sure your gut is in optimal condition, so the fiber will feed your good bacteria instead of the bad bacteria).

4. Don’t skimp on targeted carbohydrates — Most adults need around 200 to 250 grams of carbs per day for proper mitochondrial function. That includes the brain. Restricting carbs starves your body of energy and leads to reductive stress, which only worsens the cellular chaos tied to glioblastoma. I recommend slowly reintroducing safe carbs based on your gut’s tolerance.

5. Remove other common triggers of cellular damage — If you’re serious about disrupting the root cause of glioblastoma progression, eliminate the other big offenders that compromise mitochondrial and microbiome health. That includes seed oils, electromagnetic (EMF) exposure, xenoestrogens from plastics, and processed foods.

Frequently Asked Questions (FAQs) About Aspartame and Glioblastoma

Q: How does aspartame increase the risk of glioblastoma?
A: Aspartame alters gene activity tied to cancer progression by activating RNA methylation pathways, especially the N6-methyladenosine (m6A) pathway. This boosts the expression of genes like MYC, TGFB1, and CDKN1A, which are known to drive tumor growth and make glioblastoma more aggressive — even if the tumor itself doesn’t visibly enlarge.

Q: What role does the gut microbiome play in brain cancer development?
A: Your gut bacteria influence your brain through the gut-brain axis. Aspartame disrupts this by reducing bacteria like Rikenellaceae that help produce anticancer compounds. These microbial imbalances weaken immune surveillance and encourage tumor-supporting conditions in the brain.

Q: Are artificial sweeteners really worse than sugar?
A: Yes. While marketed as safer low-calorie options, artificial sweeteners like aspartame have been linked to cancer, metabolic dysfunction, gut damage, and disrupted gene regulation. The evidence shows these additives are not harmless alternatives and could cause long-term harm to your health.

Q: What should I do if I’ve been consuming aspartame regularly?
A: Start by eliminating all artificial sweeteners from your diet — this includes checking labels on diet sodas, flavored waters, gum, vitamins, and condiments. Then, support your gut with natural carbs, fermented foods, dextrose water, and collagen-rich broths to help rebalance your microbiome and restore gene regulation pathways.

Q: Is there a safer way to satisfy my sweet cravings?
A: Yes. Transition to moderate use of natural sweeteners like raw honey, maple syrup, or coconut sugar. Better yet, rely on whole fruits with fiber, which offer natural sweetness while supporting gut and brain health. Always prioritize food sources that feed your beneficial bacteria, not fuel disease.

Aspartame, a common artificial sweetener found in sugar-free sodas, protein bars and even chewing gum, is touted to be a “healthy” alternative to regular sugar, thus helping people satisfy their cravings for sweets without risking their health. While this is a popularly held belief among consumers, research shows that aspartame does the opposite — it actually endangers your health to a greater degree than sugar.

Aspartame Alters Insulin Response

A study published in Nutrients1 examined how artificial sweeteners, including aspartame, affect metabolic processes and gut microbiota composition. Researchers aimed to determine whether these sugar substitutes actually help regulate blood sugar or if they disrupt natural metabolic function.

Glucose intolerance occurs — Contrary to industry claims that artificial sweeteners are healthy, the study revealed the opposite — aspartame interferes with insulin signaling and contributes to glucose intolerance, making them hidden risk factors for metabolic disorders.2
Aspartame triggers unnatural insulin responses — Artificial sweeteners have long been marketed as a way to reduce sugar intake without affecting blood sugar levels. However, the study found that aspartame and similar sweeteners still stimulate an insulin response. This happens because the body detects sweetness and assumes sugar is coming, prompting the pancreas to release insulin even when no actual glucose is present.3
Increased risk of insulin resistance — The insulin spikes seem harmless at first, but over time, it leads to insulin resistance. When your body constantly releases insulin in response to non-caloric sweeteners, cells become less responsive to the hormone. This sets the stage for metabolic dysfunction, increasing your risk of obesity, Type 2 diabetes and cardiovascular disease.4

Gut Microbiota Composition Is Altered by Artificial Sweeteners

Beyond insulin, the study also found that aspartame disrupts the delicate balance of your gut bacteria, which consists of trillions of bacteria that regulate digestion, immune function and metabolism.

Increases glucose intolerance — Researchers discovered that aspartame consumption shifts this balance. In one published study that the researchers reviewed, “Mouse recipients of the saccharine-associated microbiome became glucose intolerant … In humans, saccharin (upper limit of the accepted daily intake) also promoted glucose intolerance and gut microbiome alterations.”5
Alterations increase weight gain — Gut bacteria play a direct role in regulating how the body processes the food you eat. A disrupted microbiome leads to improper digestion, increased fat storage and reduced energy efficiency. As noted in one of the reviewed studies by the researchers, “In Sprague-Dawley rats (7-week-old males), the ingestion of 0.05% aspartame significantly increased body weight and fat mass.”6

Aspartame’s Effects on Gut Function

Beyond insulin, aspartame also interferes with other hormonal systems that regulate metabolism.

Reduced GLP-1 function — The study noted aspartame causes changes in GLP-1 (glucagon-like peptide-1) secretion, a hormone that controls satiety and blood sugar balance. Reduced GLP-1 means that people who consume artificial sweeteners feel hungrier sooner, leading to increased food intake and weight gain over time.7
Compromised lipid metabolism — According to the researchers, an increased intake of aspartame or other artificial sweeteners “induced the loss of antioxidant capacity as well as increased atherogenic effects” of high-density lipoprotein (HDL), which is often referred as the “good” cholesterol.8

The study highlights an important point people need to know about artificial sweeteners — they do not function as proper sugar substitutes. They actively disrupt normal metabolic and hormonal processes, making it harder for your body to regulate blood sugar and maintain a healthy weight. While they look like an easy way to cut calories, their long-term effects create more significant health risks than the sugar they replace.9

Aspartame Fuels Inflammation and Artery Damage, Raising Heart Disease Risk

In a different study, published in Cell Metabolism,10 researchers investigated how aspartame consumption influences insulin levels and vascular inflammation.

Aspartame fuels artery damage — Researchers found that aspartame stimulates insulin release through your vagus nerve, leading to chronic inflammation in blood vessels. This inflammatory response directly worsens atherosclerosis, a condition in which arteries become narrowed and hardened due to plaque buildup.11
Inflammatory proteins are activated — Aspartame-induced insulin spikes are not just a metabolic issue — they drive damage inside your arteries. When insulin levels surge unnaturally, your body increases production of a specific inflammatory protein called CX3CL1. This protein acts as a signal that attracts immune cells to the blood vessel walls, leading to chronic inflammation and an increased risk of heart disease.12
Plaque buildup — In the reviewed animal models, aspartame consumption led to larger, more unstable plaques in the arteries compared to control groups. These plaques were more likely to rupture, which is a major cause of heart attacks and strokes. Even small doses of aspartame were enough to accelerate this process, making it clear that this artificial sweetener isn’t just an innocent sugar substitute — it’s actively harming your cardiovascular health.13

Aspartame Alters the Vagus Nerve’s Role in Insulin Regulation

Another shocking revelation from the study is that aspartame influences insulin levels in a completely different way than sugar. In addition, it changes the function of the vagus nerve, which acts as the information highway connecting your gut and brain.

Vagus nerve dysfunction — Instead of raising insulin through a natural glucose response, aspartame stimulates the vagus nerve, which then signals the pancreas to release insulin unnecessarily.14
Insulin sensitivity issues arise — By tricking your body into thinking sugar is present, aspartame creates a hormonal response that your body isn’t designed to handle. Over time, this disrupts insulin sensitivity and leads to metabolic dysfunction, contributing to insulin resistance and increased fat storage.15

Aspartame’s Breakdown Products Exacerbate Health Issues

Beyond its immediate effects on insulin and inflammation, aspartame also breaks down into smaller compounds that contribute to metabolic stress.

Aspartame produces methanol — Methanol, which is an industrial type of alcohol that is used to adulterate liquor,16 has been discovered to be a metabolic byproduct of aspartame digestion. According to a 2021 study, 11% of aspartame turns into pure methanol.17
The impact of methanol — When methanol is metabolized by your body, it turns into formaldehyde, which is known to impact DNA and RNA health. Specifically, formaldehyde interacts with basic proteins in the cytosols of your cells, inactivating them. According to the researchers, “such changes have been found in the brains of people suffering from autism.”18

The breakdown of aspartame contributes to long-term health issues by creating additional cellular stress. When combined with aspartame’s inflammatory effects on blood vessels, its overall impact on your body becomes even more apparent, necessitating strategies that repair your cellular health.

Eliminate Aspartame from Your Life to Protect Your Health

As I’ve mentioned in previous articles, aspartame, as well as other artificial sweeteners, will do no good for anyone’s health. It disrupts insulin function, fuels inflammation and even accelerates artery damage. To bring your health back on the right track, the first step is eliminating aspartame while also supporting your metabolism and vascular health. Here are my recommendations:

1. Remove artificial sweeteners from your diet immediately — Aspartame isn’t just in diet sodas. It hides in protein powders, flavored yogurts, sugar-free candies and even some medications. Read labels carefully — if you see products with the words “aspartame,” “acesulfame potassium” or “sucralose,” it’s time to throw them away. Familiarize yourself with other artificial sweeteners as well, such as neotame and sucralose.

Instead of artificial sweeteners, choose natural alternatives like raw Manuka honey, maple syrup or coconut sugar in moderation. If you’re trying to transition off sweeteners entirely, fresh fruit is an excellent way to satisfy your cravings while keeping your blood sugar balanced.

2. Heal your insulin sensitivity with targeted carbohydrate intake — If aspartame has already affected your insulin function, the best way to restore balance is to fuel your body with healthy carbohydrates in the right amounts. Aiming for 250 to 300 grams of quality carbs per day — more if you’re physically active — helps prevent the insulin spikes caused by aspartame.

Prioritize whole food sources like potatoes, white rice, ripe bananas, and well-cooked vegetables. If your gut health is compromised, start with simple, easily digestible carbs like white rice and whole fruit before introducing more complex starches.

3. Support your gut microbiome for better blood sugar control — Aspartame damages beneficial gut bacteria, which play a direct role in regulating insulin and metabolism. Restoring balance starts with removing harmful foods (vegetable oils, processed meats and artificial additives) and introducing gut-healing food.

Fermented foods like sauerkraut, kefir and kimchi provide natural probiotics that help rebalance your microbiome. Collagen-rich bone broth supports the gut lining, and dietary fiber from well-tolerated fruits helps feed beneficial bacteria. As noted in one study, fermented foods helped improve the metabolic health of the participants, including insulin sensitivity and glucose control.19

4. Reduce hidden sources of inflammation — Inflammation is the link between aspartame, insulin resistance and vascular disease. Cutting artificial sweeteners is just the beginning — you also need to eliminate the biggest dietary sources of inflammation, namely vegetable oils, as they’re high in linoleic acid (LA), an omega-6 polyunsaturated fatty acid.

LA drives oxidative stress and worsen insulin resistance. To minimize your intake, I recommend cooking your own food with tallow, grass fed butter and ghee.

5. Improve cellular energy production with sunlight — Artificial sweeteners disrupt cellular metabolism, but there are still other ways to restore energy production naturally, namely sun exposure. It stimulates mitochondrial function, helping your cells generate ATP (adenosine triphosphate) — the fuel your body runs on.

Aim for daily morning and midday sunlight, avoiding harsh UV exposure until you’ve been off vegetable oils for at least six months. That’s because when sunlight hits your skin, the LA embedded in it metabolizes, contributing to inflammation and DNA damage. For a more in-depth explanation on this topic, read my article “Vitamin D Deficiency Complicates Autoimmune Disease.”

Frequently Asked Questions About the Impact of Aspartame on Human Health

Q: How does aspartame affect metabolism if it has no calories?
A: Aspartame stimulates the vagus nerve, tricking your body into releasing insulin as if sugar were present. Over time, these unnecessary insulin surges lead to insulin resistance, making it harder for your body to regulate blood sugar and increasing the risk of metabolic dysfunction.

Q: Can aspartame cause inflammation in blood vessels?
A: Yes, research shows that aspartame-driven insulin spikes trigger the release of CX3CL1, an inflammatory protein that attracts immune cells to blood vessel walls. This leads to chronic inflammation, artery damage and an increased risk of atherosclerosis.

Q: What are some common foods and drinks that contain aspartame?
A: Aspartame is found in diet sodas, sugar-free gum, flavored yogurts, protein powders, sugar-free candies and even some over-the-counter medications. Checking ingredient labels for “aspartame,” “acesulfame potassium,” or “sucralose” is key to avoiding it. Beyond aspartame, be sure to avoid other products containing other artificial sweeteners.

Q: If I stop consuming aspartame, how long does it take for my metabolism to recover?
A: Your metabolism starts improving as soon as you remove artificial sweeteners, but full recovery depends on individual factors like the current state of your gut health and the diet you’re eating. Restoring insulin function with targeted carbohydrate intake and healing the gut microbiome with fermented foods will jumpstart the healing process.

Q: What is the best way to naturally regulate blood sugar without artificial sweeteners?
A: Focus on whole-food carbohydrates like potatoes, ripe fruit and white rice to provide steady energy without insulin spikes. Supporting gut health with bone broth and probiotic-rich foods also improves blood sugar control and overall metabolic health.