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Limosilactobacillus reuteri

Meet BioGaia's Limosilactobacillus reuteri strains - among the world's most clinically researched probiotics, trusted for every stage of life.

Limosilactobacillus reuteri: A probiotic strain grounded in human evolution

Limosilactobacillus reuteri is a unique species of bacteria that is grounded in evolution. Over millions of years, it naturally inhabits the gastrointestinal tract (GI) and is passed down from generation to generation. Thanks to this close connection, it may contribute to support your microbiomes.

It is said that babies first get in contact with L. reuteri during birth and breastfeeding. It’s one of the first valuable bacteria to settle in their gut. From the very beginning, L. reuteri plays a key role in helping us digest food and build a healthy microbiome for life.
Illustration of a probiotic bacterium connected to a network of yellow dots, symbolizing its interaction within a system. Illustration of a probiotic bacterium connected to a network of yellow dots, symbolizing its interaction within a system.

Why is Limosilactobacillus reuteri so special?

Not all probiotic strains work the same – it’s their specific properties that make the difference.

Let's have a closer look at a specific strain Limosilactobacillus reuteri Protectis (DSM 17938). What are unique properties of Limosilactobacillus reuteri Protectis - one of the world's most studied probiotic:
  Of human origin
  Survives the acidic environment of the stomach
  Temporarily colonizes the entire gut
  Effectively supplements the microbiota
  Safe for everyone, even the most vulnerable
 

Safety first – BioGaia and L. reuteri Protectis

Is L. reuteri Protectis safe? In one word: yes.
L. reuteri Protectis is considered safe because it:
 Co-evolved with humans, naturally present in the body
 Is clearly classified and strain-specific
•  Is manufactured under strict quality controls
 Has proven safety in the intended population
 Contains no toxins or transferable antibiotic resistance

Thanks to decades of research and high standards, it’s trusted by healthcare professionals and families worldwide.

Illustration of a probiotic bacterium with dosage indicators, symbolizing the measurement of probiotic doses Illustration of a probiotic bacterium with dosage indicators, symbolizing the measurement of probiotic doses

Proven and trusted by millions

More than 100 million units sold – and not a single reported side effect.

While clinical trials have confirmed the safety of BioGaia products — even at doses higher than those used in our formulations — real-world experience is just as powerful.
Since 2004, over 100 million units of L. reuteri Protectis drops have been sold globally. With zero reported side effects, it’s one of the most trusted probiotics available.
BioGaia products are recommended by pediatricians and loved by parents. When it comes to gut health, families around the world choose BioGaia for its proven safety and effectiveness.
 

Trusted by paediatricians - recommended by parents. 

How to read the label of a high quality probiotic?

  • Probiotic strain – Look for the full name (e.g., L. reuteri Protectis DSM 17938)
  • CFU count – Check how many live bacteria (colony-forming units) are in each dose
  • Ingredients – Review what's included and ensure it meets your dietary needs
  • Dosage – Follow the recommended amount for effective use
  • Expiry date – Make sure the product is still active with the amount stated on the label and safe to use

LongevityGuard™ - Long live BioGaia’s valuable bacteria

In order for probiotics to be effective, the valuable bacteria should be alive and active. BioGaia is the only probiotic brand on the market with LongevityGuard™ technology as sign of BioGaia’s premium quality products  

LongevityGuard™ stands for a unique, patented desiccant technology – a little stick inside each bottle and easy dropper tube - guaranteeing potency for optimal effectiveness from the first to the last drop (ensures and delivers the full amount of viable and potent probiotics as stated on the label – CFUs). Thanks to LongevityGuard™ the valuable bacteria stay alive and potent for two years at room temperature – and for three months after opening. Even with daily use. 

LongevityGuard™ technology is used in BioGaia Protectis drops with/without Vit D3 and BioGaia Pharax drops.
 

Why daily intake of L. reuteri matters

Although L. reuteri has co-evolved with humans since the beginning of time, it is now naturally present in very low numbers or absent in the body due to the effects of modern lifestyles (low-fibre diet, stress, use of antibiotics and environmental factors). Luckily, L. reuteri can be reintroduced through BioGaia's probiotics.

A daily intake of probiotics is necessary because these beneficial bacteria are naturally expelled from the body within a week or two. Regular consumption ensures that you maintain an adequate level of L. reuteri in your gut.

 

Gut Health & Immunity

Gut Health & Immunity

Along with oxygen, food is vital to human life. It is up to our digestive system to extracts the nutrients we need from it, which is not always an easy job. In our gut, there is a constant battle between good and bad bacteria.

The importance of bacteria

The importance of bacteria

Probiotics are good bacteria that promote a healthy gut. When in balance, the good bacteria defend our bodies against harmful bacteria. But sometimes they need support to thrive.

What are Probiotics

What are Probiotics

“Probiotics” is a general term for live microorganisms that are beneficial for the body – some even call them “friendly” bacteria. Read on for more info on these little helpers.