All Diseases Start in the Mouth
Why oral health is the gatekeeper to preventing chronic disease
The mouth is one of the most heavily colonized environments in the human body, and when it’s neglected, inflamed, or chronically infected, it becomes a constant source of toxins and oxidative stress. Swallowing, inhaled particles, and even small gum bleeds can send microbial debris and inflammatory signals deeper into your system.
As I am reading through books and content by Dr. Thomas Levy, I decided that I had to bring attention to this topic as well. The chronic pathogen exposure from the mouth can quietly fuel systemic illness before symptoms show up elsewhere.
You can eat clean, supplement religiously, and follow every wellness trend hyped in the media, but if you are not giving your mouth the attention it needs and deserves, then you’re upstream of the problem source.
Biofilms: The Silent Driver of Chronic Disease
This discussion isn’t necessarily about cavities, although amalgam fillings and root canals do cause toxic issues that flow to the rest of the body. The main point of discussion today is about biofilms.
Biofilms are sticky, protective microbial communities that shield bacteria, fungi, and viruses from the immune system. Once established, they act like toxin factories, constantly releasing inflammatory byproducts that stress the body and overwhelm repair mechanisms.
Brushing alone doesn’t remove them. Mouthwash doesn’t penetrate them and at the same time may wipe out healthy oral flora. Antibiotics barely touch them and also can cause gut dysbiosis which worsens diseases.1
This is why oral health issues correlate so strongly with heart disease, autoimmune conditions, metabolic dysfunction, and neurodegeneration. It’s not coincidence that chronic exposure coupled by not eliminating the root cause of the pro-oxidant, disease causing source creates the perfect environment for ongoing inflammation.
Heart Plaques Contain Oral Bacteria
For decades, heart disease has been framed as a cholesterol problem, but that narrative starts to fall apart when you look at what’s actually been found inside atherosclerotic plaques removed from human arteries. Multiple studies cited by Dr. Thomas Levy in his book, Rapid Virus Recovery, document the presence of DNA from oral and periodontal bacteria embedded directly within coronary plaques. These are not loose associations or correlations—they are physical detections of bacterial genetic material inside the lesions themselves. This evidence strongly supports the model that cardiovascular disease is driven, at least in part, by chronic infection and inflammation originating in the mouth, where bacteria gain access to the bloodstream through inflamed or bleeding gums. When oral pathogens repeatedly seed the vascular system, they contribute to ongoing oxidative stress and immune activation, setting the stage for plaque formation and instability.2 Here again, this argues why adequate vitamin C is necessary to reverse inflammation, especially for the heart and vascular system.
Amalgam Fillings: A Chronic Source of Inflammation
Dental amalgam fillings—commonly referred to as “silver fillings”—are composed of roughly 50 percent elemental mercury, combined with silver, tin, and copper. Mercury is a well-documented neurotoxin with no known safe level of exposure, and amalgam fillings continuously release mercury vapor, especially during chewing, grinding, or exposure to heat. This vapor is readily absorbed through the lungs and oral tissues and can accumulate in the brain, kidneys, and nervous system. Dr. Levy and others argue that this represents a chronic, low-grade toxic burden that can impair mitochondrial function, disrupt immune regulation, and worsen oxidative stress over time. While amalgams have been normalized for decades, their continued use persists more out of institutional inertia than biological safety, particularly when safer alternatives exist.3 Finding a biological dentist to remove fillings is an option to consider.
Root Canals: Sealed Infection, Systemic Consequences
Root canals are often presented as a routine solution—remove the nerve, seal the tooth, problem solved. But according to Dr. Thomas Levy, this approach ignores a critical biological reality: a dead tooth is still a tooth embedded in living bone, and once the blood supply is removed, the body has no way to deliver immune cells or oxygen to that tissue. The result is a sealed, anaerobic environment where pathogenic bacteria can thrive undetected. Levy explains that root-canaled teeth frequently harbor toxic microbial byproducts, including highly inflammatory sulfur compounds, which can leak into surrounding tissues and the bloodstream over time. These chronic, low-grade infections may remain asymptomatic locally while contributing to systemic inflammation, autoimmune activation, neurological symptoms, and cardiovascular stress. In this framework, root canals don’t eliminate infections—they encapsulate them, creating a persistent source of oxidative and immune burden that the body must continually manage.4 The only real solution to remove the source of infection is to remove the tooth.
Oil Pulling for Oral Hygiene
Oil pulling isn’t trendy or mystical, it’s a practical way to help support healthy teeth and gums. Swishing oil through the mouth helps collect fat-soluble microbial waste and biofilm debris that water-based rinses can’t grab. 5You’re not detoxing your whole body through oil pulling, and anyone claiming that is overselling it. What you are doing is reducing the toxic burden at the source. Oil pulling doesn’t replace brushing or flossing. It’s an adjunct. A simple way to reduce microbial load before it ever becomes a systemic issue. Tongue scraping has also been shown to reduce the bacteria and biofilms that contribute to bad breath.6
Prevention of Disease: Start at the Source
If there’s one takeaway from all of this, the mouth is the gateway to the rest of the body, and when it’s chronically inflamed, infected, or neglected, everything downstream pays the price. Biofilms, toxic dental materials, silent infections, and poor hygiene don’t stay neatly contained, they create a constant background of oxidative stress that the body has to fight every single day.
Once again, root cause disease prevention and treatment is about paying attention to the basics that we were never taught to connect by our dentists or doctors. If my article helped you see oral health differently, I invite you to follow my work and become a paid subscriber.
My book, Get Healthy or Get Dead is a playbook on how lifestyle choices, sleep, stress reduction, and nutrition intersect with real health. You can also purchase my activity workbook, and my book is also available as an audiobook and as an e-book.
Zoë Brookes, Leanne Teoh, Fabian Cieplik, and Purnima Kumar, “Mouthwash Effects on the Oral Microbiome: Are They Good, Bad, or Balanced?” International Dental Journal 73, no. Suppl. 2 (2023): S74–S81.
Levy, Thomas E. Rapid Virus Recovery. Henderson, NV: MedFox Publishing, 2021, 276–281.
Levy, Thomas E. Rapid Virus Recovery. Henderson, NV: MedFox Publishing, 2021, 231–233.
Levy, Thomas E. Rapid Virus Recovery. Henderson, NV: MedFox Publishing, 2021, 210–212.
S. Asokan, P. Emmadi, and R. Raghuraman, “Oil Pulling Therapy — A Traditional Remedy,” Journal of Natural Science, Biology and Medicine 5, no. 1 (2014): 71–74.
Hyeon-cheol Choi et al., “The Effect of Mechanical Tongue Cleaning on Oral Coating and Bad Breath,” International Journal of Environmental Research and Public Health 19, no. 108 (2022): sec. 5.