Lactobacillus reuteri
Lactobacillus reuteri is a probiotic supplement — a probiotic species found in the human gut; several strains are commercially available. 4 peer-reviewed studies are available in our database. Common forms include L. reuteri, BioGaia Protectis.
Content reviewed by Zynava Research Team · Last updated February 2026 · Editorial policy
Find Quality Lactobacillus reuteri Supplements
Explore lactobacillus reuteri supplements and browse options based on ingredient research.
What Is Lactobacillus reuteri?
A probiotic species found in the human gut; several strains are commercially available.
Lactobacillus reuteri Supplement Forms
Lactobacillus reuteri is available in several supplemental forms: L. reuteri, BioGaia Protectis.
Explore Lactobacillus reuteri Supplements
Use our research tool to explore lactobacillus reuteri supplements and see what studies have examined.
Research Studies on Lactobacillus reuteri
Our database contains 4 peer-reviewed studies examining lactobacillus reuteri. Below are selected recent studies:
Related Supplements
Natural Food Sources of Lactobacillus reuteri
Before considering supplementation, it is worth exploring dietary sources of lactobacillus reuteri. Whole foods provide nutrients in their natural matrix alongside fiber, enzymes, and other beneficial compounds that can enhance absorption and utilization.
- Yogurt — Contains live cultures; look for labels stating "live and active cultures"
- Kefir — A fermented milk drink with diverse probiotic strains
- Sauerkraut — Naturally fermented (unpasteurized) cabbage rich in beneficial bacteria
- Kimchi — Korean fermented vegetables with diverse microbial communities
- Kombucha — A fermented tea containing various probiotic organisms
Dietary Context
Probiotic organisms — beneficial bacteria and yeasts — occur naturally in many fermented foods. These foods have been dietary staples across cultures for millennia. While probiotic supplements provide specific strains in controlled amounts, fermented foods offer a broader diversity of organisms along with additional nutritional benefits like vitamins, enzymes, and organic acids.
Absorption: Food vs. Supplements
Probiotic organisms from food must survive the acidic environment of the stomach to reach the intestines. Consuming them with or just before meals may provide some pH buffering. Dairy-based fermented foods may offer a protective matrix for the organisms during transit.
Practical Tips
- Choose unpasteurized fermented foods when possible, as pasteurization kills beneficial organisms
- Prebiotic foods (onions, garlic, bananas, asparagus, oats) feed existing beneficial gut bacteria
- Variety is key — different fermented foods provide different beneficial strains
How to Take Lactobacillus reuteri
Getting the most from lactobacillus reuteri supplementation involves more than just choosing the right product. When and how you take it can significantly affect absorption and effectiveness.
Best time to take: Varies by herb — check specific guidance
With or Without Food
Many herbal supplements are better tolerated when taken with food. Fat-soluble herbal compounds (like curcumin) benefit from being taken with a fat-containing meal.
How Often
Typically 1-3 times daily. Many herbs take weeks of consistent use before effects are noticeable.
Practical Tips
- Consistency is key — many herbs require weeks of regular use for noticeable effects
- Some practitioners recommend cycling herbal supplements (e.g., 8 weeks on, 2 weeks off)
- Start with lower doses and increase gradually to assess tolerance
Important Interactions
- Many herbs can interact with prescription medications — always inform your healthcare provider
- St. John's Wort is particularly known for numerous drug interactions
- Pregnant and breastfeeding women should consult a provider before using herbal supplements
This is not an exhaustive list of interactions. Always consult a healthcare provider or pharmacist about potential interactions with your specific medications and health conditions.
Where to Find Lactobacillus reuteri Supplements
If you are considering lactobacillus reuteri supplementation, choosing a quality product from a reputable retailer is an important step. Here are some trusted options where you can browse and compare lactobacillus reuteri supplements.
How to Choose a Quality Lactobacillus reuteri Supplement
- Check for third-party testing certifications (USP, NSF, or ConsumerLab) which verify potency and purity
- Compare cost per serving rather than total package price for accurate value comparison
- Read the supplement facts panel to verify the amount of active ingredient per serving
- Look for products with minimal unnecessary fillers, binders, or artificial additives
To explore supplements by ingredient or health goal, try our AI Supplement Advisor.
Research Highlights: Lactobacillus reuteri
Scientific inquiry into lactobacillus reuteri has produced 2 clinical trials, 1 meta-analysis, 1 systematic review over the period 2016 to 2025. The following highlights are drawn from peer-reviewed publications in our research database. Study results reflect controlled conditions and may differ from real-world outcomes.
Effects of Limosilactobacillus reuteri ID-D01 Probiotic Supplementation on Exercise Performance and Gut Microbiota in Sprague-Dawley Rats
Published in Probiotics Antimicrob Proteins. Study from 2025.
Source: View full study on PubMed
The efficacy and acceptability of Lactobacillus reuteri for the treatment of depression: A systematic review and meta-analysis
Published in Gen Hosp Psychiatry. Study from 2025. Comprehensive analysis combining multiple studies.
Source: View full study on PubMed
Microbiota and Probiotics: The Role of Limosilactobacillus Reuteri in Diverticulitis
Published in Medicina (Kaunas). Study from 2021.
Source: View full study on PubMed
Lactobacillus reuteri DSM 17938 as a Probiotic for Preterm Neonates: A Strain-Specific Systematic Review
Published in JPEN J Parenter Enteral Nutr. Study from 2016. Comprehensive analysis combining multiple studies.
Source: View full study on PubMed
The research summaries above are based on published peer-reviewed studies and are provided for informational purposes only. Study findings may not apply to all individuals, and the presence of a study summary does not constitute an endorsement of lactobacillus reuteri for any specific health condition. Always consult a qualified healthcare professional before making decisions based on research findings.
Important Information
Special Considerations for Children and Older Adults
Supplement needs vary considerably across age groups. Children have different nutritional requirements than adults, and many adult-formulated supplements contain doses that are inappropriate or potentially harmful for younger individuals. Pediatric supplements should be specifically formulated for children and given under the guidance of a pediatrician. Gummy vitamins marketed to children often contain added sugars and may not deliver consistent doses.
Older adults face their own unique challenges. Age-related decreases in stomach acid production can impair absorption of vitamin B12 and certain minerals. Reduced sun exposure and less efficient skin synthesis of vitamin D make supplementation more commonly recommended for adults over 65. Kidney function changes can affect how the body processes certain supplements. If you are selecting supplements for a child or an older family member, professional medical guidance is especially important to ensure safety and appropriate dosing.
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