How epigenetic influences on pet longevity, including toxins and nutrient deficiencies, accelerate aging in pets – along with integrative strategies to support health and longevity in dogs and cats.

Over the past several decades, the veterinary field has witnessed extraordinary advances in diagnostics, surgical techniques, and therapeutics. Yet despite these advances, pets are experiencing chronic illnesses at younger ages, and living shorter lives.

Rates of cancer, autoimmune disease, arthritis, kidney and cardiac disease are rising sharply. Even more alarming, studies suggest our pets’ lifespans have shortened by nearly seven years over the last 25 years.

We are told this is “normal aging.” But aging itself is not a disease. Chronic incessant inflammation in the body as it ages leads to what is now referred to as “inflammaging.” Inflammaging describes the epidemic of chronic “dis-ease” in cats, dogs, and people as a result of epigenetic influences, lifestyle exposures to toxins (heavy metals, glyphosate, mycotoxins, microplastics) along with nutrient deficiencies. Toxicities and deficiencies of essential nutrients are modifiable, and when addressed, they profoundly improve both quality and length of life.

This article will share insights into the hidden drivers of accelerated aging such as epigenetic influences on pet longevity and provide practical strategies for supporting pets holistically as they age.

The myth of “normal aging”

Many pet parents accept arthritis, lethargy, or heart disease in aging animals as an unavoidable part of getting old and/or breed predisposition. But the reality is that aging is not synonymous with disease, and there are epigenetic influences on pet longevity because breed predisposition is greatly affected by epigenetic influences. Less than 1% of disease is caused by genes; the rest is lifestyle and environment.1

Healthy aging is possible. There are many documented cases of pets living into their 20s and 30s who remain active and vibrant. For example, Creme Puff, a Guinness World Record-holder cat, lived for 38 years and three days. Bobi, a dog, lived to be 30 years and 266 days old. What differentiates these animals from those struggling with chronic “dis-ease” is not genetics alone. It is also the “terrain,” the environment in which cells function. There are epigenetic influences on pet longevity and the terrain is shaped by lifestyle choices such as nutrition, toxic burden, and the ability to detoxify and repair.2

Lifestyle: the foundation of health-span

The problem with processed foods

The cornerstone of healthy longevity is diet. For decades, pet parents were conditioned to trust that kibble and canned foods were “complete and balanced.” However, mounting evidence shows that ultra-processed pet foods are among the greatest contributors to chronic disease.

• Nutrient deficiency: Cheap highly-processed diets typically use low-grade ingredients. Products grown without regenerative farming conditions are nutrient deficient. Animals that consume these foods are at risk for nutrient deficiencies.
• Nutrient depletion: Processing at high heat destroys fragile vitamins, digestive enzymes, and fatty acids.
• Dehydration risk: Kibble diets contain only about 6% to 12% moisture, whereas fresh or raw diets provide 60% to 75% moisture. Because dogs and cats are evolutionarily designed to obtain most of their water from food, dry diets often lead to chronic low-level dehydration. Studies show that pets fed high-moisture diets maintain significantly better hydration and improved digestion compared to those consuming dry extruded foods.3
• Synthetic supplementation: The food industry has long recognized that today’s commercially-grown foods are nutrient deficient, requiring the addition of vitamins, minerals, and fatty acids to help complete the dietary needs of the pet. To meet AAFCO requirements, many companies add synthetic vitamins, which are poorly absorbed and may even trigger inflammation.
• Rancid fats: As soon as kibble bags are opened, fatty acids oxidize, creating harmful free radicals.
• Carbohydrate overload: Carnivores were never designed to consume high levels of starches and fillers like corn, wheat, and soy, yet many processed diets contain over 40% to 60% carbohydrates.
• Mycotoxins and contaminants: Grains and legumes stored in bulk are frequently contaminated with aflatoxins, ochratoxin A, fumonisins, and zearalenone, all of which are toxic to the liver, kidneys, and immune system.
• Microplastics: Many commercial diets (kibble and canned) have been found to contain microplastics. These can act as endocrine disruptors and lead to mechanical blockage of small vessels.
• Glyphosate: The active ingredient in Roundup is one of the most pervasive toxins in our environment and food supply. It’s commonly sprayed on genetically modified crops such as corn, soy, wheat, and oats, ingredients frequently used in processed pet foods. Repeated exposure through these foods can disrupt gut microbiota, hormone balance, and cellular detoxification pathways, contributing to inflammation and chronic disease.4

A peer-reviewed study published in the Journal of Animal Physiology and Animal Nutrition (2017) found that dogs fed a processed diet for just 17 days had significantly higher markers of oxidative stress and inflammation compared to those on a fresh diet.

A study conducted by the University of Helsinki (Scientific Reports, 2023) found that dogs fed a fresh, minimally processed diet during puppyhood and adolescence had a significantly lower risk of developing chronic enteropathies (CE) later in life compared to those fed ultra-processed kibble.

Conversely, feeding an ultra-processed, carbohydrate-based diet (dry kibble) during those early life stages was a significant risk factor for CE in adulthood. The authors emphasized that while causality cannot be definitively proven from this observational study, the associations strongly suggest early life diet is a modifiable factor in long-term gut health.5

Exposure to toxins

Pets today are living in an increasingly toxic world. They:

• Walk unprotected on chemically treated lawns
• Drink tap water laced with fluoride and heavy metals
• Breathe indoor air contaminated by flame retardants, microplastics and mycotoxins
• Are exposed to petroleum-based home cleaning products
• Are frequently over-vaccinated
• Are exposed to pesticides for flea, tick, and heartworm prevention.

Key toxic burdens in the environment:

• Glyphosate is the most widely used herbicide in the world. It disrupts the gut microbiome; damages the actin filaments holding the tight junctions together, resulting in “leaky gut;” impairs detox pathways; and is strongly linked to cancer.

Toxins in pharmaceuticals, edibles, and pet toys:

• Pharmaceutical overuse: Antibiotics, NSAIDs, and steroids damage the gut, microbiome and liver, compounding deficiencies and toxicities.
• Heavy metals: Arsenic, lead, and mercury accumulate over time, interfering with mitochondrial function and cardiac health.
• Microplastics: These are present in many commercially-processed diets, dry treats, toys and bowls. Studies have shown that the average person carries around 21 microplastic particles in their body at any given time. In testing at Pasco Veterinary Medical Center, findings show pets with levels in the high 30s and even 40s, nearly double what is seen in humans.
• Mycotoxins: Present in many commercial kibbles and dry treats.

A deeper look at microplastics and mycotoxins – and their impact

1. Microplastics

Microplastics are found in nearly every ecosystem. Studies show these plastics accumulate in tissues such as the liver, kidneys, and intestines, where they trigger oxidative stress, disrupt cellular membranes, and impair detoxification pathways. These particles also carry absorbed toxins (like heavy metals and persistent organic pollutants) into the body, compounding toxic load.

In pets, chronic ingestion of microplastics from kibble packaging, contaminated water, or commercial food additives may contribute to gut dysbiosis, immune dysfunction, endocrine disruption, and even cardiac stress, as the body diverts resources to manage ongoing inflammation. Over time, microplastic burden accelerates mitochondrial decline, aging, and vulnerability to chronic disease. Thanks to advanced technology, we can now test for microplastics in the bodies of both humans and animals.6

“It was initially suspected that a subset of the population had detectable amounts of microplastics in their bloodstreams,” says Alan Morrison of Arrow Lab Solutions. “Through our test, we determined that nearly 98% of the populous is positive. When Dr Siegel contacted me, I figured animals would be much lower, as they aren’t generally exposed to fast fashion and fast food. However, we have yet to find a single pet test negative for microplastics.”

2. Mycotoxins

Mycotoxins are toxic compounds produced by mold. They commonly contaminate bulk-stored grains and are consequently frequent contaminants in kibble diets and commercial pet treats. Even at low levels, they damage the liver, the body’s primary detox organ, leading to impaired detoxification, fat metabolism issues, and weakened immune defenses.

Certain mycotoxins, such as aflatoxins and ochratoxins, are carcinogenic, while others promote kidney damage, gastrointestinal inflammation, and nutrient malabsorption. Chronic exposure compromises the intestinal barrier (“leaky gut”), fueling the systemic inflammation that underlies arthritis, allergies, and autoimmune disease. In cardiac health specifically, aflatoxin exposure has been linked to oxidative injury in myocardial tissue, raising risk of arrhythmias and weakened heart function.7

Nutrient deficiencies: fueling the fire

Routinely testing patients for nutrient deficiencies is recommended. Over 85% of animals eating kibble or canned diets are deficient in at least one critical nutrient, but more often several essential nutrients. These deficiencies can stem from poor-quality ingredients, suppression of nutrient uptake from mycotoxins, lack of bioavailability, or compromised absorption due to gut dysbiosis.

Common deficiencies in aging pets

• Omega-3 fatty acids — Essential for heart, brain, and joint health; easily destroyed during kibble processing
• Taurine and carnitine — Critical for cardiac function; deficiencies are directly linked to dilated cardiomyopathy (DCM)
• Magnesium — Key for hundreds of enzymatic reactions, including energy metabolism and heart rhythm regulation
• Antioxidants (vitamin E, selenium, CoQ10) – Defend against oxidative stress but are sparse in most processed diets
• Vitamin D — Essential for activating and regulating the innate immune response; enhances the body’s first line of defense against pathogens while supporting bone and cellular health
• Vitamin B complex — Supports energy metabolism, red blood cell formation, healthy neurological function, and strong bones, helping maintain overall vitality and resilience
• Zinc and selenium — Trace minerals critical for immune function, antioxidant defense, and cellular repair
• Organ-derived micronutrients — Liver, kidney, pancreas and spleen provide unique peptides and cofactors that are absent in synthetic supplements.

Deficiencies impair cellular resilience, worsening the toxic load, which in turn accelerates deficiencies – creating a vicious cycle.

A roadmap for healthy aging in pets

Health and longevity in pets are not only possible, but also achievable with an integrative approach. Here are six steps for supporting senior pets:

Create a healthy lifestyle before acquiring a pet. Plan for species-appropriate nutrition, toxin-free environments, and a “health care” strategy. Establish the foundation early, including appropriate testing based on age, breed, and possible epigenetic influences on pet longevity.

Transition to a species-appropriate, grass-fed, and finished raw diet. This should include organs such as kidney, liver, spleen and pancreas.

Provide supplements. Organic essential vitamins, minerals, amino acids, and fatty acids in a bioavailable form help support good health.

Reduce toxin exposures. Health begins with the environment our pets (and we) live in every day. Reducing toxic exposures allows the body’s natural regenerative systems to thrive.

Water quality: Provide filtered and structured water for both you and your pets. Filtration should remove contaminants down to 1 micron, eliminating microplastics, heavy metals, chlorine, and pathogens. Structured and re-mineralized water supports optimal hydration and cellular communication.

Air quality: Indoor air can be up to five times more polluted than outdoor air. Choose an air purification system that filters particles to 1 micron and moves a sufficient volume of air through the space, ensuring the entire room’s air is exchanged multiple times per hour. Look for systems that remove VOCs, formaldehyde, and mold spores.

Cleaners and detergents: Non-organic household cleaners and laundry products are common sources of volatile toxins and hormone disruptors. Switch to biodegradable, fragrance-free alternatives made from plant-based surfactants. Even small changes here can dramatically reduce chemical load for pets who spend much of their time close to floors and fabrics.

EMF and dirty electricity: Electromagnetic fields are an invisible but growing stressor on the body’s biofield. Start by filtering “dirty electricity” before it enters the home, and minimize exposure from WiFi routers, cordless phones, and smart devices during rest hours.

Lawn care: Avoid glyphosate-based lawn chemicals; they contribute to oxidative stress and microbiome disruption.

Pharmaceuticals: Avoid unnecessary pharmaceuticals whenever possible, as they can also disrupt the microbiome and increase oxidative stress.

Support detox pathways. Utilize safe binders (zeolite, humic/fulvic acids), liver-supportive herbs (milk thistle, dandelion), and modalities such as ozone or infrared therapy when indicated.

Correct deficiencies. Assess through appropriate testing, and supplement based on results to ensure optimal nutrient balance.

Enhance mitochondrial health.

Light: Encourage regular exposure to natural sunlight or use full-spectrum infrared therapy to support cellular energy and repair.

Movement: Promote daily physical activity to stimulate mitochondrial function, improve circulation, and maintain vitality.

Fresh air: Have the pet spend time in clean, fresh air to optimize oxygen delivery, reduce stress, and sustain energy.

Nutrition: Provide nutrient-dense foods rich in antioxidants to protect mitochondria and support overall well-being.

Address trapped emotions and stress. Support the human–animal bond by cultivating calm, balanced energy.

Mitochondrial dysfunction

Toxins accelerate mitochondrial dysfunction, a central mechanism of aging. Mitochondria are the “powerhouses” of the cell, producing ATP. When damaged, energy production falters, inflammation rises, and disease develops, particularly in high-energy organs like the heart.

Cardiac health as a case study

The heart offers a powerful example of how lifestyle choices, toxin exposure, and nutrient deficiencies accelerate the aging process.

• Taurine deficiency was once thought to affect only cats, but recent cases of DCM in dogs show otherwise.
• Oxidative stress from rancid fats and toxins accelerates myocardial fibrosis and arrhythmias.
• Mitochondrial dysfunction reduces energy availability for the heart’s high metabolic demands.
• Heavy metals like lead and arsenic are associated with hypertension and reduced cardiac output.

In clinical practice, correcting nutrient deficiencies, reducing toxins, and supporting cardiac health through diet can have profound effects. Case studies and peer-reviewed research have shown that dogs with diet-related cardiac conditions, such as dilated cardiomyopathy or myxomatous mitral valve disease, can experience measurable improvements in cardiac function when provided with targeted nutritional support.

Key nutrients including taurine, L-carnitine, CoQ10, B vitamins, and Omega-3 fatty acids play essential roles in supporting myocardial health, reducing oxidative stress, and improving metabolic efficiency. Transitioning pets to species-appropriate, grass-fed/grass-finished or free-range raw diets rich in organ meats and bioavailable nutrients further supports these outcomes by supplying naturally occurring vitamins, minerals, and cofactors often lacking in processed diets.

Collectively, these interventions have been associated with improved heart function, enhanced energy levels, and overall vitality in affected pets.

Raising your vibration through gratitude, love, and compassion not only enhances your own well-being but also influences your pet’s physiology, as animals naturally entrain to our emotional energy. Incorporate integrative modalities such as acupuncture, chiropractic care, massage, and energy medicine to further harmonize body, mind, and spirit for both guardian and pet.

The decline in health and longevity we are witnessing in cats and dogs is not an inevitable consequence of aging; it is a consequence of lifestyle, toxicities, and deficiencies. By addressing these root causes, we can dramatically improve both lifespan and health span, giving pets vibrant, joyful years alongside the people who love them.

As veterinary professionals, we have a profound opportunity and responsibility to shift the paradigm from managing disease to cultivating true wellness. Together, let us create a future where healthy aging is not the exception but the norm.

For those interested in deepening their understanding, it is always valuable to educate yourself and explore courses designed to teach integrative veterinary medicine. Continuous learning can expand the ways we help our patients thrive. For more information on training and solutions go to www.transformingvetmedicine.com, www.drmarlenesiegel.com or
www.evolovestore.com.

1. Dr. Bruce H. Lipton, The Biology of Belief (2005); Jump From Cell Culture to Consciousness (2019, PMC6438088).
2. Guinness World Records. Creme Puff, oldest cat.
   Oldest cat ever | Guinness World Records.
3. Guinness World Records. Bobi, oldest dog.
   https://www.guinnessworldrecords.com/world-records/oldest-dog.
4. Journal of Animal Science, 2024; Mendeley Data Repository, 2023.
5. Hemida M, et al. “Early life diet is associated with the risk of chronic enteropathy in dogs,” Scientific Reports 13, 2023, University of Helsinki.
6. Frontiers in Veterinary Science, 2021; Toxins Journal, 2022; Environmental Science & Technology, 2023.
7. Roslan NS, et al. “Detection of microplastics in human tissues and organs: A scoping review.” J Glob Health. 2024;14:04179. DOI:10.7189/jogh.14.04179.

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