Now, this may not sound groundbreaking if you’ve studied basic physiology, but it’s one of those foundational concepts that keeps getting misunderstood in today’s nutrition world.
Now, I realize that this isn’t groundbreaking information. If you paid attention in basic physiology, you’ve seen this before.
But it’s one of those foundational concepts that gets overlooked (and misunderstood) in today’s nutrition space.
There’s a common belief that removing carbohydrates removes glucose from the equation. That without dietary carbs, blood sugar becomes irrelevant.
Glucose is still very much part of the picture, whether you eat carbs or not.
Even on a carnivore diet, your body still requires glucose, and more importantly, your body will make it whether you eat carbs or not.
This isn’t a flaw in the diet. It’s a built-in survival mechanism.
Why Your Body Still Needs Glucose
Certain tissues in the body cannot rely on fat or ketones alone.
- Red blood cells lack mitochondria, so they must use glucose
- Parts of the brain still require glucose, even in ketosis
- The kidneys and other tissues also contribute to glucose demand
So even in a fully fat-adapted state, glucose doesn’t disappear, it becomes internally regulated.
Enter Gluconeogenesis (Your Backup System)
When dietary carbohydrates are low or absent, your body shifts to a process called gluconeogenesis
This is where the liver (and kidneys) create glucose from non-carbohydrate sources:
- Amino acids (from protein)
- Lactate (recycled from metabolism)
- Glycerol (from fat breakdown)
This process keeps blood sugar stable and ensures critical systems keep functioning.
This Process Is Not “Stress Mode”
There’s a narrative that gluconeogenesis is harmful or a sign your body is under stress.
That’s not accurate.
Gluconeogenesis is:
- Constant (even in people who eat carbs)
- Demand-driven (not just “turned on” randomly)
- Essential for survival
Even someone eating a mixed diet still uses gluconeogenesis between meals or overnight.
Protein Intake Matters More Than You Think
On a carnivore diet, protein isn’t just for muscle, it’s also a key substrate for glucose production.
This is where nuance matters:
- Too little protein → insufficient building blocks for repair and glucose needs
- Adequate protein → supports both muscle protein synthesis AND glucose production
Your body is constantly balancing: “Do I use this amino acid for muscle… or convert it to glucose?”
And it will prioritize survival first.
Does This Mean Protein Turns into Sugar Automatically?
No. This is one of the most misunderstood points.
Protein does not automatically convert to glucose just because you ate it.
Gluconeogenesis is regulated by need, not supply.
- If your body needs glucose → it will convert substrates
- If it doesn’t → it won’t “waste” protein unnecessarily
This is why high-protein diets don’t inherently spike blood sugar in the same way carbohydrates do.
What About Ketones? Aren’t They Enough?
Ketones do reduce the body’s need for glucose but they don’t eliminate it.
Think of ketones as: A glucose-sparing mechanism, not a full replacement
They allow:
- The brain to rely less on glucose
- More stable energy in low-carb states
But glucose is still required in specific roles that ketones cannot fill.
Performance, Recovery, and Context
This is where things get more individualized.
Some people thrive on carnivore diets, especially for:
- Blood sugar regulation
- Simplicity and appetite control
- Reducing digestive issues (carnivore is a band-aid approach for this one)
But for others, especially those who:
- Training at high intensity
- Trying to maximize muscle growth
- Needing rapid recovery
Carbohydrates can still play a role.
Not because carbs are “essential” … but because they can be strategically beneficial.
The Bigger Picture
The takeaway isn’t that carnivore is wrong.
It’s that the human body is highly adaptive.
- Remove carbs → your body makes glucose
- Increase demand → your body adjusts fuel usage
- Change intake → metabolism responds
Your physiology is not fragile—it’s responsive.
Final Thought
You can remove carbohydrates from your diet.
But you cannot remove glucose from your biology.
Your body will always find a way to maintain what it needs.
The real question is:
“Is my current approach aligned with my goals, activity level, and recovery demands?”
If you’re navigating that balance right now, this is the work worth paying attention to. If your goal is better performance, recovery, or body composition, it’s worth looking beyond trends. and into how your body works.
Ready to Find the Right Fuel Strategy for Your Body?
If you’re trying to figure out whether a carnivore or lower-carb approach truly supports your energy, recovery, and long-term goals, I can help you create a plan based on your physiology, not trends.
Book a free Discovery Call to explore how integrative coaching can help you align your nutrition with your real goals.
With love and wellness,
Brooke
Certified Integrative Health Practitioner | Founder, Kestra Health