Lactobacillus (Genus) L. reuteri
L. reuteri is a supplemental form of lactobacillus (genus). 768 studies on lactobacillus (genus) are available in our database. Learn how lactobacillus (genus) l. reuteri compares to other forms.
Content reviewed by Zynava Research Team · Last updated February 2026 · Editorial policy
What Is Lactobacillus (Genus) L. reuteri?
L. reuteri is a supplemental form of lactobacillus (genus). A genus of bacteria commonly used in probiotic products; effects vary by strain. Some species were reclassified (e.g., L. rhamnosus → Lacticaseibacillus rhamnosus).
How Lactobacillus (Genus) L. reuteri Compares
Lactobacillus (Genus) is also available as L. acidophilus, L. rhamnosus GG, L. plantarum.
About Lactobacillus (Genus)
A genus of bacteria commonly used in probiotic products; effects vary by strain.
Find Lactobacillus (Genus) L. reuteri Supplements
Compare lactobacillus (genus) l. reuteri products and explore your options.
Other Lactobacillus (Genus) Forms
Compare different forms of lactobacillus (genus) and explore your options:
Research on Lactobacillus (Genus)
Our database contains 768 peer-reviewed studies on lactobacillus (genus):
FAQ: Lactobacillus (Genus) L. reuteri
What is Lactobacillus (Genus) L. reuteri?
L. reuteri is a supplemental form of lactobacillus (genus). A genus of bacteria commonly used in probiotic products; effects vary by strain. Some species were reclassified (e.g., L. rhamnosus → Lacticaseibacillus rhamnosus).
How does Lactobacillus (Genus) L. reuteri compare to other forms?
Lactobacillus (Genus) is also available as L. acidophilus, L. rhamnosus GG, L. plantarum.
What other forms of Lactobacillus (Genus) are available?
Lactobacillus (Genus) is also available as Lactobacillus (Genus) L. acidophilus, Lactobacillus (Genus) L. rhamnosus GG, Lactobacillus (Genus) L. plantarum. The best form depends on individual absorption, tolerance, and specific needs.
Natural Food Sources of Lactobacillus (Genus)
Dietary sources of lactobacillus (genus) offer the advantage of providing the nutrient alongside other beneficial compounds naturally present in food. Here is a look at the most significant food sources and practical tips for optimizing your intake.
- 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 (Genus) L. reuteri
To optimize the benefits of lactobacillus (genus) l. reuteri supplementation, consider these practical guidelines on timing, food pairing, and potential interactions based on available research.
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 (Genus) L. reuteri Supplements
Ready to explore lactobacillus (genus) l. reuteri supplements? These reputable retailers offer a range of options with customer reviews and competitive pricing. Always compare products by checking the amount of active ingredient per serving.
How to Choose a Quality Lactobacillus (Genus) L. reuteri Supplement
- Verify the expiration date and that the product is stored appropriately
- Research the brand — established companies with transparent testing are generally more reliable
- Consider subscription options for supplements you plan to take long-term — many retailers offer discounts
- Check the other ingredients list for potential allergens (soy, gluten, dairy, nuts)
To explore supplements by ingredient or health goal, try our AI Supplement Advisor.
Research Highlights: Lactobacillus (Genus) L. reuteri
Our database includes 2 meta-analysiss, 2 reviews, 1 randomized controlled trial examining lactobacillus (genus) l. reuteri, published between 2020 to 2025. Below are selected findings that illustrate the current state of research. These summaries are educational — not clinical recommendations — and individual outcomes may vary.
Probiotics and gastrointestinal disorders: an umbrella meta-analysis of therapeutic efficacy
An umbrella meta-analysis showing probiotics significantly reduced symptoms like diarrhea, nausea, and bloating. Found effects were more pronounced with shorter intervention durations (≤ 2–4 weeks) and multi-strain formulations. Notes that moderate to high heterogeneity and generally low methodological quality in some included meta-analyses limit the robustness of the findings.
Source: View full study on PubMed
Systematic review and meta-analysis of randomized controlled trials on pre-, pro-, post- and synbiotic supplementation in follow-on formula
A systematic review and meta-analysis of RCTs on biotics in follow-on formula for children. Found that the use of pre- and synbiotics appears more effective for viral respiratory infections than for diarrheal episodes. Concluded that high-quality evidence is sparse and called for larger, well-designed trials with a primary health-related endpoint.
Source: View full study on Other
Global analysis of clinical trials with probiotics
A global analysis of over 1,000 clinical trials with probiotics registered on ClinicalTrials.gov and ICTRP. Found that Lactobacillus rhamnosus GG (LGG) and Bifidobacterium animalis ssp. lactis BB12 are the most frequently studied probiotic strains. Highlights the importance of defining probiotics at the specific strain level due to the great diversity of probiotic bacteria.
Source: View full study on PubMed
An evidence-based update on the diagnosis and management of irritable bowel syndrome
An expert review on the diagnosis and management of Irritable Bowel Syndrome (IBS). Mentions that probiotics may be beneficial for IBS symptoms, but the quality of evidence is poor for specific strains and formulations. Highlights that psychological therapies (CBT, hypnotherapy) are effective for persistent symptoms.
Source: View full study on Expert Review of Gastroenterology & Hepatology
Probiotics reduce negative mood over time: the value of daily self-reports in detecting effects
A randomized, double-blind, placebo-controlled study in 88 healthy volunteers on the effects of a multispecies probiotic on emotion and mood. Found clear evidence that probiotics reduce negative mood, starting after two weeks, based on daily monitoring. Concludes that probiotics can benefit mental health in the general population, especially when using sensitive daily monitoring methods.
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 (genus) l. reuteri for any specific health condition. Always consult a qualified healthcare professional before making decisions based on research findings.
Important Information
When You Take a Supplement Can Affect How Well It Works
The timing of supplement intake can significantly influence absorption and effectiveness. Fat-soluble vitamins such as A, D, E, and K are better absorbed when taken with a meal that contains dietary fat. Iron supplements are best absorbed on an empty stomach but can cause digestive discomfort, so some people tolerate them better with a small amount of food. Calcium is absorbed most efficiently in doses of 500 mg or less, so splitting larger daily doses across meals can improve uptake.
Some supplements also interact with each other when taken simultaneously. For instance, calcium can interfere with iron absorption, so these minerals should ideally be taken at different times of day. Magnesium and zinc can compete for the same absorption pathways at very high doses. Zynava provides timing and pairing guidance where research supports specific recommendations, helping you get the most benefit from your supplement routine.
How to Read a Supplement Label
Understanding supplement labels is essential for making informed purchasing decisions. Key elements to examine include the Supplement Facts panel (which lists active ingredients and their amounts per serving), the "Other Ingredients" list (which reveals fillers, binders, coatings, and additives), the serving size, and any allergen warnings. Look for products that clearly state the specific form of each ingredient — for instance, "Magnesium (as Magnesium Glycinate)" is more informative than simply "Magnesium."
Zynava's label analysis tools are designed to help you decode supplement labels quickly. We flag proprietary blends that hide individual ingredient amounts, identify potentially unnecessary additives, and highlight when a product uses less bioavailable forms of key nutrients. Becoming a savvy label reader empowers you to choose supplements based on substance rather than marketing claims.
This content is for general educational purposes only and is not intended as medical advice. Consult a healthcare professional before starting any supplement. See our full disclaimer and affiliate disclosure.