06/06/2026
🧬 Most pet parents have never heard of microRNA.
It may be one of the most important reasons fresh food feeding matters...
and the pet food industry would very much prefer it stay that way.
The following is what the science is telling us, and why it changes everything about how we think about what goes into your dog's bowl.
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Food Is Not Just Fuel. It Is Biological Information.
For decades, nutrition science focused almost entirely on macronutrients (protein, fat, carbohydrates) and micronutrients like vitamins and minerals. The underlying assumption was simple: food is a delivery vehicle. Break it down, extract the nutrients, and the body does the rest.
That model is now known to be profoundly incomplete.
MicroRNAs (miRNAs) are tiny, non-coding RNA molecules present in whole, fresh foods. They are not nutrients in the traditional sense. They do not provide energy or build tissue directly. What they do is far more sophisticated!
👉 They regulate gene expression.
In plain language, the food your dog eats contains molecular signals that travel into their cells and determine which genes are switched on and which are switched off.
This is not metaphor. This is molecular biology.
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🔬 What Does "Regulating Gene Expression" Actually Mean?
Your dog's DNA contains the instructions for virtually every biological process in their body. But having a gene does not mean it is active. Gene expression is the process by which specific genes are read and translated into proteins that carry out biological functions.
MicroRNAs act as regulators of this process. Think of them as volume controls on specific biological programs.
A single miRNA molecule can bind to messenger RNA (mRNA) and either silence a gene entirely or reduce how actively it is expressed.
Depending on which genes are being regulated, this influences:
✔️ Immune system calibration: which inflammatory pathways are activated or suppressed
✔️ Cell proliferation and apoptosis: the normal process of programmed cell death that prevents damaged or abnormal cells from multiplying unchecked
✔️ Metabolic regulation: how efficiently glucose, fatty acids, and amino acids are processed at the cellular level
✔️ Inflammatory response thresholds: how aggressively or appropriately the body mounts an inflammatory response to injury or pathogen exposure
✔️ Tissue repair signaling: the speed and accuracy of cellular recovery after damage
When your dog's cells receive the correct miRNA signals from biologically appropriate food, these processes run with precision. When those signals are absent, degraded, or replaced with synthetic inputs, the regulatory system loses critical information.
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🔬 The Cross-Kingdom Discovery, And Why It Matters for Carnivores
The research that first demonstrated food-derived miRNAs crossing the gut barrier and entering circulation was conducted using plant-derived miRNAs (specifically from rice) entering mammalian tissue. That landmark finding (Zhang et al., 2012) opened an entirely new field of nutritional science.
This does not mean plants are uniquely important for your dog.
The significance of the plant research was the proof of concept. It demonstrated for the first time that dietary miRNAs survive digestion, cross biological barriers, enter the bloodstream, and exert measurable regulatory effects on gene expression in the recipient animal.
That mechanism applies equally to animal-derived foods.
Raw meat, organ tissue, eggs, and fish are extraordinarily rich sources of miRNAs, and for a facultative carnivore like your dog, animal tissue miRNAs are the biologically native signals their cells evolved to receive.
Organ meats in particular, liver, kidney, heart, spleen, are among the most miRNA-dense foods that exist. This is one of the reasons ancestral feeding models that prioritize organ inclusion produce results that macro and micronutrient analysis alone cannot fully explain.
The food your dog was designed to eat speaks to their cells in a language those cells recognize.
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🔬 What Ultra-Processing Does to This System
The extrusion process used to manufacture dry kibble exposes ingredients to temperatures typically ranging from 130°C to over 180°C (265°F to 356°F) under high pressure. This is done rapidly and repeatedly to form, dry, and stabilize the final product.
RNA molecules, including miRNAs, are fragile. They are highly sensitive to heat, and their structural integrity is compromised well below extrusion temperatures. By the time a kibble product reaches your dog's bowl, the miRNA content of the original ingredients has been largely or entirely denatured.
What remains are fragmented, non-functional RNA remnants.
The synthetic vitamin and mineral premix added back after processing replaces measurable nutrient levels, but it cannot replace biological signaling molecules.
There is no synthetic miRNA supplement. There is no manufacturing process that restores what heat destroys.
Ultra-processed food does not just deliver incomplete nutrition.
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It delivers biologically silent information.
Your dog's cells are waiting for signals that never arrive.
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🔬 Why This Reframes the Entire Fresh Food Conversation
The traditional argument for fresh food feeding has centered on bioavailability, digestibility, the absence of synthetic additives, and the appropriateness of whole-food ingredients for a carnivore's physiology. All of that remains valid and important.
But microRNA science adds an entirely new dimension.
We are no longer discussing only what nutrients your dog's food contains.
We are now discussing whether your dog's food is still biologically alive, whether it retains the molecular intelligence that whole, fresh, minimally processed food carries and ultra-processed food irrevocably loses.
A fresh raw meal of muscle meat, organ, bone, egg, and fish is not just nutritionally superior to a bowl of kibble.
It is informationally superior.
It speaks to your dog's genome in a language that evolved over millions of years...
and that no synthetic formulation has yet come close to replicating.
This is not fringe science.
This is published, peer-reviewed molecular biology at the frontier of nutritional research.
And it is one more reason why feeding fresh, species-appropriate food is not a trend, a philosophy, or a lifestyle choice.
It is biology. 🐾
💬 Had you ever heard of microRNA before today? Drop your questions below. I want to hear what this brings up for you.
— The Holistic Canine 🐾 theholisticcanine.us
NRC balanced meals at home:
👉 Fresh feeding explained — finally.
"Fresh-Food Feeding Explained" eBook
Available on our website❗️
https://theholisticcanine.us/ebook/
