Alflorex Original - Daily Gut Health Supplement with Unique Bifidobacterium Longum Bacteria Strain 35624 - Bacterial Cultures - 30 Capsules

Overview

Alflorex Original is one of the most talked-about gut health supplements in the UK, and its strong 4.5 out of 5 rating across more than 1,600 reviews puts it among the best-reviewed probiotics in its category. What sets it apart from a shelf full of generic multi-strain capsules is its focus: a single, specific bacterial strain that has been studied more than most. Here is what it actually contains, who it tends to suit, and whether it earns its premium price.

What is Alflorex and how does it work?

Alflorex is built around one carefully selected bacterial strain: Bifidobacterium longum 35624, sometimes written as B. infantis 35624. It is exclusive to PrecisionBiotics in the UK, which is why you will not find this exact strain in supermarket own-brand probiotics. Rather than throwing in a dozen strains at a high headline count, Alflorex bets on one well-researched culture.

The idea behind any probiotic is to top up the friendly bacteria in your gut microbiome, which plays a role in digestion and general wellbeing. Alflorex is designed so the live cultures survive stomach acid and reach the gut in good condition, and it needs no refrigeration, which makes daily use and travel simpler than with fridge-stored probiotics.

Bifidobacterium longum 35624, also called B. infantis 35624

If you have searched for this strain you may have found it under two different names, and the confusion is real rather than a mistake on anyone's part. The culture in Alflorex was originally classified as <strong>Bifidobacterium infantis 35624</strong> and is still widely referred to that way in older research papers and by many pharmacists. It was later reclassified as <strong>Bifidobacterium longum subspecies longum 35624</strong>, which is why the current UK packaging says longum.

It is the same organism either way: strain 35624, developed at University College Cork and commercialised by PrecisionBiotics. When you compare products, the number is what identifies it, not the species name in front of it.

This matters when shopping because <strong>35624 is exclusive to PrecisionBiotics products in the UK</strong>. A generic "bifidobacterium" on another label is not the same thing: bifidobacterium is a whole genus containing many strains that behave differently. If a product does not name the exact strain number, you cannot assume you are getting this one.

Ingredients: what is actually in an Alflorex capsule

The formula is deliberately short, which is part of the appeal. Each capsule provides the live <strong>Bifidobacterium longum 35624</strong> culture in a simple carrier, with no unnecessary extras.

<div class="guide-table-wrap"><table class="guide-table"><thead><tr><th>What you get</th><th>Detail</th></tr></thead><tbody><tr><td><strong>Active culture</strong></td><td>Bifidobacterium longum 35624 (formerly B. infantis 35624)</td></tr><tr><td><strong>Pack</strong></td><td>30 capsules, one-month supply at one a day</td></tr><tr><td><strong>Free from</strong></td><td>Gluten, dairy, lactose, soya</td></tr><tr><td><strong>Suitable for</strong></td><td>Vegetarians; low FODMAP diets</td></tr><tr><td><strong>Storage</strong></td><td>No refrigeration needed</td></tr><tr><td><strong>How to take</strong></td><td>One capsule daily, with or without food, any time</td></tr></tbody></table></div>

There is no prebiotic fibre, no blend of extra strains and no added vitamins. That is a design choice: the product is built around one studied culture rather than a long ingredient list, which is also why it suits people on a low FODMAP diet who react badly to prebiotic fibres such as inulin or FOS.

The routine is simple: one small capsule a day, with or without food, at any time. One pack is a one-month supply. As with any supplement, it is worth reading the label, and this is a food supplement rather than a medicine, so it does not replace advice from a doctor.

On allergens and diet: it is gluten free, dairy free and lactose free, and it needs no refrigeration, which is unusual for a live culture and makes it easy to travel with. One small capsule a day, with or without food, at any time. One pack is a one-month supply.

Does Alflorex actually work? What the evidence says

This is the most-asked question about Alflorex and it deserves a straight answer rather than a brochure one.

Strain 35624 is <strong>unusually well studied for a consumer probiotic</strong>. It was developed at University College Cork and has been the subject of published human trials, most of them in irritable bowel syndrome, where several reported improvements in bloating, abdominal discomfort and bowel habit against placebo. That is a genuinely stronger evidence base than most products on the shelf, which typically rely on general claims about the category rather than on their own specific strain.

The honest qualifications: probiotic effects are <strong>strain-specific and person-specific</strong>. Trials report averages, and within any average some people improve markedly and others not at all. Several of the studies were funded by the developer, which is normal in this field and still worth knowing. And no probiotic is a treatment: under UK rules it cannot be sold as treating or curing anything.

So the fair summary is that Alflorex has better evidence behind its specific strain than almost anything else you can buy without a prescription, and that this still does not tell you whether it will work for <em>you</em>. The only way to find that out is a proper trial of it, which brings us to the next point.

IBS, bloating and constipation: what people actually use it for

Most of the research on 35624 sits in <strong>IBS</strong>, and that is where the product is best known. Reported benefits centre on bloating and abdominal discomfort, with bowel habit improving in some participants.

It is also widely used by people following a <strong>low FODMAP diet</strong>, and it carries certification as low FODMAP, which matters because many probiotics use prebiotic fibres such as inulin or FOS that are themselves high FODMAP and can make symptoms worse. Alflorex contains no prebiotic fibre, which is a design decision rather than an omission.

On <strong>constipation</strong> specifically, the picture is more mixed. IBS comes in constipation-predominant, diarrhoea-predominant and mixed forms, and a strain that helps one person's bloating may do little for another's transit time. If constipation is your main symptom rather than bloating, be realistic about what a single-strain probiotic will do, and know that fibre intake, fluid and movement do more for most people than any capsule.

<strong>A line worth naming:</strong> IBS is a diagnosis of exclusion, and symptoms that look like IBS can have other causes. See a GP rather than self-treating if you have blood in your stool, unexplained weight loss, a change in bowel habit lasting more than a few weeks, symptoms starting after age 50, or a family history of bowel cancer or coeliac disease.

Where to buy it in the UK, and what it should cost

Alflorex is sold widely rather than exclusively: <strong>Boots, Sainsbury's, Holland &amp; Barrett, larger Tesco stores, independent pharmacies and Amazon</strong> all stock it, and PrecisionBiotics sells direct.

Prices move around more than you might expect for a single-SKU product, and a 30-capsule pack is the standard unit. Pharmacy and supermarket shelf prices tend to sit at the higher end, while multi-pack and subscription options online are usually where the per-capsule cost drops. Because this is a product people take for months rather than weeks, per-capsule cost is the number that matters rather than the pack price.

The live price on this page is fetched from Amazon when you load it, so it is current rather than something we typed in. It is worth a quick comparison against your local pharmacy, because the gap is occasionally large in either direction.

One thing to check whatever you buy: <strong>35624 is exclusive to PrecisionBiotics products in the UK.</strong> A cheaper capsule listing "bifidobacterium" without the strain number is not the same organism, and strain is what the research is about.

Is Alflorex worth it? Our verdict

At £23.85 for a month, Alflorex is dearer than a basic multi-strain probiotic, and the honest answer is that you are paying for the specific, well-studied 35624 strain and its clean, low FODMAP friendly formula rather than a bigger bacteria count. The 4.5 rating from a large number of reviewers suggests plenty of people feel it works for them, though probiotics are individual and results vary from person to person.

If you want a simple, once-a-day, fridge-free capsule built on a single researched strain, and especially if you follow a low FODMAP diet, Alflorex is a sensible, well-reviewed choice. If you just want the cheapest general probiotic, a budget multi-strain will cost less. If you have ongoing digestive symptoms, speak to your GP or a dietitian rather than relying on a supplement alone.

Key features, as the manufacturer lists them

Taken from the product listing via Amazon's product API. These are the seller's claims, not our test results.

• UNIQUE BACTERIA STRAIN: Each capsule of Alflorex Original is packed with live bacteria from the Bifidobacterium longum family, specifically strain 35624, carefully selected for its efficacy. Bifidobacterium longum 35624 is a unique strain, only found in PrecisionBiotics products in the UK.
• LIVE FRIENDLY BACTERIA: Alflorex Original is scientifically proven to reach and survive in the human gut. The bacterial cultures reach your gut in peak condition within a few hours of taking it.
• THE GUT MICROBIOME: Did you know that good health starts with the microbiome? It’s an amazing universe of bacteria that helps to look after our health. It can affect digestion, metabolism, immunity, and brain health.
• EASY TO TAKE: Take one Alflorex Original capsule every day (one pack contains a 1 month supply). Can be taken with or without food, at any time of the day. No need for refrigeration. Convenient small capsule. Gut health supplement for women & men. Always read the label.
• SUITABLE FOR: Vegetarians and those on low FODMAP diet. Gluten free, soya free, diary free, lactose free.

Frequently asked questions

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