The Fiber Fallacy

Published on 26 March 2025 at 13:20

Here, we explore a topic that might sound a little surprising at first: Is fiber really essential for a healthy diet? We're often told that fiber is crucial, but what if I told you that's not entirely true? In fact, people following the carnivore diet thrive without any fiber at all. And if we look at carnivorous animals like lions, fiber isn’t a significant part of their diet either. So, let’s unpack why fiber might not be as necessary as you’ve been led to believe.


Let’s start with the carnivore diet. This is an all-animal-based diet, which means zero fiber – no fruits, veggies, grains, or any plant foods that traditionally provide fiber. And yet, people on this diet report amazing health benefits! From better digestion and mental clarity to weight loss and reduced inflammation, they seem to be doing just fine without fiber. In fact, many who switch to carnivore say their digestion actually improves.

One reason could be that animal products are highly bioavailable, meaning our bodies can easily absorb and utilize the nutrients in them without needing fiber to 'push things along,' so to speak. Meat and fat are digested

and absorbed efficiently, leaving very little waste behind. That means there’s less bulk needing to be eliminated.


Okay, so you might be thinking, 'But what about constipation or gut health? Isn’t fiber essential for that?' That’s a common concern. We’ve all been taught that fiber is necessary to keep things moving in our digestive tract. But many people on the carnivore diet report the exact opposite – they feel better without fiber. They often have less bloating, fewer stomach issues, and better overall digestive function.

This makes sense when we look at the human digestive system. It’s not designed to handle large amounts of plant fiber the way herbivores’ systems are. Animals like cows or gorillas have specialized guts to break down and ferment fiber. But humans? We’re more like carnivores in that sense. If you compare our digestive system to that of a lion, you’ll notice some similarities. Lions are pure carnivores, they don’t eat fiber, and yet, their digestion is smooth and efficient.


Speaking of lions, let’s talk about carnivorous animals for a second. Lions, wolves, and other predators thrive without fiber in their diet. They survive and stay healthy by consuming just meat and fat – no fiber at all. And they don't suffer from digestive issues, constipation, or poor health because of it. In fact, their bodies are perfectly adapted to a fiber-free diet, just like many humans who follow a carnivore lifestyle.

So, what does that tell us? It suggests that fiber isn’t a biological necessity for everyone. Our bodies can function, and even thrive, without it, especially if we’re eating a nutrient-dense, animal-based diet."


Another big point we need to address is gut health. You’ve probably heard that fiber feeds the 'good' bacteria in your gut. While it’s true that fiber can be fermented by gut bacteria to produce short-chain fatty acids, it’s not the only way to support a healthy gut. The carnivore diet naturally eliminates many foods that cause inflammation and gut irritation, like grains, legumes, and other high-fiber plant foods. By cutting out these irritants, people often see improved gut health, even without fiber.


So, to sum it all up: fiber might not be as essential as we’ve been told. People on the carnivore diet are living proof that you can thrive without it. And if we look at the animal kingdom, particularly at carnivorous animals like lions, they do just fine without fiber in their diets. It’s all about understanding that different diets work for different people – and for some, fiber-free might just be the way to go!

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