Prebiotic vs. Probiotic, and Why Mr. Regular Uses Solnul®
This article breaks down the difference between prebiotics and probiotics, why prebiotics may matter more than most people realize for daily use, and why Mr. Regular is built around a specific Canadian-made prebiotic ingredient called Solnul®.
The simplest way to think about it
Imagine your gut is a garden.
Probiotics are seeds. They're live bacteria you add to the garden, through fermented foods like yogurt, kefir, kimchi, or kombucha, or through supplement capsules.
Prebiotics are fertilizer. They feed the bacteria that already live in the garden.
You can plant all the seeds you want. If the soil isn't fertile, not much grows. That's roughly what's happening inside most people's digestive systems. They already have trillions of bacteria. What those bacteria need isn't more company, it's food.
Probiotics = seeds. Prebiotics = fertilizer. Most adults already have a garden. The question is whether they're feeding it.
What probiotics actually are
Probiotics are living microorganisms, usually specific strains of bacteria or yeast, that may offer health benefits when consumed in adequate amounts.
They're found naturally in fermented foods. They're also sold as capsules, powders, drinks, and gummies with brand names promising everything from immunity to mood support.
Probiotics have their place, especially in specific situations: after a course of antibiotics, during travel, or when a clinician recommends a particular strain for a particular reason. But here's the part most marketing doesn't mention. Probiotics are highly strain-specific. A study showing benefit from one strain tells you nothing about a different strain in another bottle. And many of the bacteria in over-the-counter probiotics don't survive the trip through stomach acid in the first place.
For most healthy adults, the daily question isn't which bacteria should I add? It's am I feeding the bacteria I already have?
What prebiotics actually are
Prebiotics are types of fibre that humans don't digest, but that the bacteria in your colon do. They pass through your small intestine intact, reach your large intestine, and become fuel for your microbiome.
When your gut bacteria ferment prebiotic fibre, they produce short-chain fatty acids, compounds that support the gut lining, the immune system, and even communication between the gut and the rest of the body through the gut-brain axis.
The most well-studied prebiotic fibres include:
- Inulin: found in chicory root, Jerusalem artichoke, garlic, and onions.
- Psyllium husk: the soluble fibre most fibre supplements are built around.
- Resistant starch: a specific kind of carbohydrate that resists digestion and reaches the colon intact.
Most Canadians don't get enough of any of these. The average adult eats roughly half the daily fibre recommended by Health Canada, and only a small portion of that is prebiotic fibre specifically.
That gap is the entire reason Mr. Regular exists.
Side-by-side comparison
Probiotic vs. Prebiotic — What's the Difference?
| Probiotic | Prebiotic | |
|---|---|---|
| What it is | Live bacteria | Fibre that feeds bacteria |
| Role in the gut | Adds new bacteria | Feeds existing bacteria |
| Effect is strain-specific | ✓ | ✗ |
| Counts toward daily fibre | ✗ | ✓ |
| Refrigeration sometimes needed | Often | ✗ |
| Easy to take daily for years | Strain-cycling common | ✓ |
| Builds the foundation | ✗ | ✓ |
| Best for most adults daily | Situational | ✓ |
Why Mr. Regular is built around prebiotics
When we designed Mr. Regular, we made a deliberate choice: focus on feeding what's already there, not adding more.
Three reasons.
One — daily consistency matters more than complexity
Most adults don't need a different probiotic strain every six weeks. They need a daily fibre habit that actually gets followed. Prebiotic fibre is something you can take every day for years without strain-cycling, refrigeration, or guessing.
Two — prebiotics work through a clean mechanism
The bacteria in your gut either get fed or they don't. That's a much cleaner story than the strain-specific debates inside the probiotic category.
Three — most people are missing the basics
Adding probiotics to a system that doesn't have enough fibre is like watering one plant in a dry garden. Fix the foundation first.
Why Solnul® — and what it actually is
Mr. Regular is built around three prebiotic ingredients: organic psyllium husk, Orafti® inulin, and Solnul® resistant starch. Each one feeds the microbiome in a slightly different way.
Solnul® is the one that takes the most explaining, so let's spend a minute on it.
Solnul® is a resistant potato starch, specifically a type called RS2, developed and produced by MSP Starch Products Inc., the largest potato starch producer in Canada. It's made from upcycled, non-GMO Canadian potatoes.
Unlike regular starch, the kind in white bread or pasta that breaks down quickly into sugar, resistant starch is structured in a way your small intestine can't digest. It travels through, intact, and reaches the large intestine, where your gut bacteria ferment it.
What makes Solnul® different from a generic resistant starch
- Clinically studied at a low daily dose. Most resistant starches need 10–20 grams a day to do anything measurable. The manufacturer's published research shows prebiotic effects at 3.5 grams a day, small enough to fit into a daily product without bloating or discomfort.
- Supports beneficial bacteria. According to MSP's clinical data, Solnul® has been associated with increases in Bifidobacterium, one of the most-studied beneficial gut bacteria.
- FODMAP Friendly certified. Also Gluten-Free, Non-GMO Project Verified, and Upcycled Certified™.
- Sustainable by design. The starch is recovered from potato processing streams that would otherwise be wasted.
- Made in Canada. For a Canadian fibre brand, sourcing a clinically backed prebiotic from a Canadian supplier wasn't a marketing decision. It was the logical one.
Solnul® is made by MSP Starch Products Inc., Canada's largest potato starch producer. A Canadian fibre brand, using a Canadian prebiotic, backed by Canadian research. The full supply chain from potato to product stays in this country.
You can read the manufacturer's research and certifications directly at solnul.com.
So which one do you actually need?
The honest answer: probably both, eventually, but start with the foundation.
If your daily fibre intake is below the Health Canada recommendation, which it is for most adults, adding a probiotic before fixing your prebiotic baseline is solving the second problem before the first.
Get your fibre habit in place. Make it daily. Make it something you actually drink, not something sitting in a drawer. Then layer in fermented foods or probiotics if a clinician recommends them for your situation.
That's the order we'd suggest. It's also the order Mr. Regular is designed for: a clean, daily, prebiotic-first fibre that makes the basic foundation easy to hit.
What to look for on the label
When you're comparing prebiotic fibre supplements, here's a quick checklist:
- A real prebiotic ingredient, named: inulin, psyllium husk, or resistant starch (Solnul® or similar).
- Dose disclosed: if the label doesn't tell you how much of the prebiotic fibre is in each serving, that's a signal.
- Multiple prebiotic types: different prebiotics feed different bacteria. A blend can be more effective than a single fibre alone.
- Short ingredient list: if you can't pronounce half the ingredients, that's a signal too.
- No artificial sweeteners: these can work against the microbiome you're trying to support.
- Made in Canada: shorter supply chain, fresher product, local quality standards.
The takeaway
Probiotics add bacteria. Prebiotics feed bacteria.
Most healthy adults benefit more, day in and day out, from feeding what's already there. Mr. Regular is built around three prebiotic ingredients, including Solnul®, a Canadian-made, clinically studied resistant starch that supports the microbiome at a low daily dose.
We made these choices because daily fibre should be simple, transparent, and worth taking every day. Not in theory. In practice.
Feed your gut, not just clear it
Mr. Regular is built around three prebiotic ingredients, including Solnul®, a clinically studied resistant starch made in Canada. Smooth vanilla. No artificial sweeteners. Ships across Canada.