GUT SANITATION SQUAD: PART 1

Apr 21
6 min read

I would like to start by asking you to imagine a city without garbage collection and a waste disposal system. Utter chaos, right? Now imagine this chaos being replicated inside our bodies! That’s kind of what happens inside our bodies without enough fiber in our diet. If your gut were a bustling city, fiber would be the sanitation squad – quietly working behind the scenes, keeping the streets clean, removing the waste, and making sure everything runs smoothly.

This is probably one of the most important pieces I will be writing, and in an attempt to fit it all in, I had to split it into a two-part series. So grab a snack (suggestion: blueberries with yogurt or carrots with cream cheese), and let’s get started with Part 1 and lay the foundations.

Let’s tap into some basics: what is fiber? Believe it or not, fiber is actually a carb. But not the kind we have been taught to fear (we shouldn’t be fearing carbs in the first place – out body thrives on them). Carbohydrates come in many forms, namely sugars, starch, and fiber. Once ingested, sugars and starches break down into glucose, and the body gets busy dealing with them. Fiber, on the other hand, travels through you, cleaning out the bad stuff along the way.

The Sanitation Squad at Work

Your gut is home to trillions of microbes like bacteria, fungi, and viruses that together form your microbiome. Think of them as tiny tenants renting space in your intestines. Just like tenants, they need food. And their favorite food? Fiber, more specifically – prebiotic fibers. These are the types of fiber foods that we can’t digest, but they can. When they break fiber down, they produce magical little molecules called short-chain fatty acids (SCFAs) – butyrate, acetate, and propionate.

These SCFAs are NOT just waste products. They:

Strengthen your gut lining (your body’s security gate).
Train your immune system to distinguish friend from foe.
Calm inflammation throughout the body.
Even signal directly to the brain, influencing mood and stress responses.

So if your gut was a long street, without fiber, trash piles up, harmful bacteria flourish, inflammation spikes, and the city struggles.

A Pinch of Reality

First things – it’s important to know some numbers. The average daily recommended fiber intake globally is 25g–35g per day. Researchers have tried to estimate fiber consumption, and after looking at all the statistics, one can conclude that most of the world’s population is consuming less than half the recommended value, with a very small percentage of the population meeting the recommendations.

Modern diets are fiber bankrupt. Centuries ago, humans ate 50–100 grams of fiber daily (this is not recommended anymore due to the shift in our lifestyles). Today, the global average is closer to 10-15 grams. This gap is more than a number – it’s a gradual starvation of our microbial self. Without fiber, certain crucial species vanish, immunity starts to collapse, and gut health deteriorates. This microbial “extinction” may explain the rise in inflammatory, metabolic, and even mental health disorders in the modern era. I know these numbers sound gloomy, but I promise we will dive into actionable steps and strategies in Part 2.

A Sprinkle of Positivity

For most people today, the recommended fiber intake feels like “a lot” simply because our diets have become so fiber-poor. The good news is our gut is highly adaptable. Research shows that our gut adapts to what we eat, even boosting the enzymes needed to digest foods we start eating regularly.

A classic example is lactose, the sugar in milk. Nearly 75% of the world’s population is lactase deficient, meaning it lacks the enzyme needed to digest it. Biologically, humans aren’t meant to produce lactase beyond infancy. Yet, due to animal domestication, dairy farming, and decades of marketing milk as a calcium staple, people began consuming it daily. Over time, many guts adapted to process lactose better than nature originally designed.

Now don’t get me wrong – I’m not advocating drinking more milk to “train” your gut. There are plenty of other ways to meet your calcium and energy needs without the downsides of excess dairy consumption. This example simply demonstrates just how adaptable our gut can be. So if you’ve cut out a nutritious food because it once made you bloated or gassy, try reintroducing it slowly. Think chutney-sized or a sprinkle on top: even a small portion with your meal can help your gut adapt and give you the confidence to keep going.

Fiber and Gut Disorders

There is a wealth of research examining how fiber-rich foods impact digestive disorders and symptoms. Trials have shown that increasing dietary fiber can ease constipation, improve stool frequency, and even reduce risks of certain gut-related diseases. But there’s a catch – the benefits often depend on which type of fiber and who is eating it.

Take IBS (irritable bowel syndrome), for example. While some fibers, like psyllium husk, are well tolerated and can help reduce symptoms, others (such as wheat bran) may actually worsen discomfort because of fermentable compounds called fructans. This doesn’t mean fiber is “bad” for IBS – it simply highlights that not all fibers act the same way in every gut.

For people with diagnosed gut disorders, it’s crucial that you introduce fiber with the guidance of a qualified health professional. As for those without diagnosed disorders, fiber interventions still show wide-ranging benefits: improved bowel regularity, reduced cholesterol, and better blood sugar control. Even mild symptoms – like sluggish digestion, low energy, constipation or acidity – often respond positively to a more fiber-rich diet. For instance, something as simple as a bowl of Greek yogurt with berries, flax, and chia seeds (instead of popping an antacid/laxative needlessly) will send powerful signals to your gut microbes for better digestion over time while avoiding the negative consequences.

In short, fiber isn’t a one-size-fits-all prescription, but when introduced thoughtfully, it can be one of the most reliable allies for both prevention and management of gut issues.

A Glimpse Ahead

I believe any functional health professional can say this without a doubt—fiber is not optional, it’s foundational. It feeds your microbes, strengthens your immunity, and acts as your body’s sanitation crew. But here’s the real question: what does this mean for your day-to-day life? How do you bring these science-heavy insights onto your plate in a way that’s sustainable and joyful?

That’s exactly what we’ll explore in Part 2 – where we’ll break down different fiber types, talk diversity, explore how “30 plants a week” can transform your gut-brain axis, and how to do this in a way that doesn’t overload your digestive system.

So grab another snack and explore how fiber truly comes alive.

Thanks a lot for making it to the end! ☺

If you are interested in exploring the science further, check out the reference list below, and always remember to research before making a choice.