Lactobacillus acidophilus lactobacillus rhamnosus and lactobacillus reuteri

Lactobacillus acidophilus (L. acidophilus) is a type of probiotic ("good" bacteria) found in the human gut, mouth, and vagina, and also in certain foods.

"Good" bacteria such as L. acidophilus can help break down food, absorb nutrients, and fight off "bad" organisms that might cause diseases. L. acidophilus is sometimes added to fermented foods like yogurt and is also found in probiotic supplements.

People commonly use L. acidophilus for diarrhea from antibiotics, as well as irritable bowel syndrome (IBS), overgrowth of bacteria in the vagina, and an infection caused by the bacteria Helicobacter pylori (H. pylori). It is also used for acne, hay fever, eczema, and many other conditions, but there is no good scientific evidence to support many of these other uses. There is also no good evidence to support using L. acidophilus COVID-19.

Don't confuse L. acidophilus with other probiotics, or with fermented food products such as fermented milk, kefir, or yogurt. These are not the same. Also note that the Lactobacillus genus was split up into 25 different genera in April 2020. Some other species' names changed, but L. acidophilus remained the same.

CONDITIONS OF USE AND IMPORTANT INFORMATION: This information is meant to supplement, not replace advice from your doctor or healthcare provider and is not meant to cover all possible uses, precautions, interactions or adverse effects. This information may not fit your specific health circumstances. Never delay or disregard seeking professional medical advice from your doctor or other qualified health care provider because of something you have read on WebMD. You should always speak with your doctor or health care professional before you start, stop, or change any prescribed part of your health care plan or treatment and to determine what course of therapy is right for you.

This copyrighted material is provided by Natural Medicines Comprehensive Database Consumer Version. Information from this source is evidence-based and objective, and without commercial influence. For professional medical information on natural medicines, see Natural Medicines Comprehensive Database Professional Version.
© Therapeutic Research Faculty 2020.

Drug information provided by: IBM Micromedex

US Brand Name

  1. Dofus
  2. Intestinex
  3. MFA
  4. Novaflor
  5. Probiata
  6. Superdophilus

Descriptions

Lactobacillus acidophilus is a probiotic that is used to help maintain the number of healthy bacteria in your stomach and intestines.

This supplement is available without a prescription.

This product is available in the following dosage forms:

  • Capsule
  • Tablet
  • Wafer
  • Tablet, Chewable
  • Powder for Suspension

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Portions of this document last updated: Nov. 01, 2022

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Lactobacillus acidophilus lactobacillus rhamnosus and lactobacillus reuteri

 - addressing misunderstandings

Lactobacillus acidophilus lactobacillus rhamnosus and lactobacillus reuteri

The probiotics market is growing, but so with it are the number of misconceptions about probiotic products and their effects. In this article we highlight some of the more common probiotics misconceptions and try to address them.

  • Some probiotic strains have been extensively studied and their health benefits documented, but these benefits cannot be generalized to all probiotic products

  • The indicated bacteria need to be delivered in the right amount for the particular health area

  • Check which probiotic to use, check the specific strain and check the appropriate colony forming units (CFU) level

1) Are all probiotics the same?

No 

The properties of probiotic strains are vastly dissimilar, resulting in a large variety of probiotic products with distinct documented effect or no documented effects. Many products only specify the species contained, and not the strain. For example, a product may be labelled Lactobacillus rhamnosus, but whether the strain is Lactobacillus rhamnosus, LGG®, the very different Lactobacillus rhamnosus, GR-1®, or any other Lactobacillus rhamnosus strain, is not known, and so neither is the documented potential health benefit. Further, clinically observed effects are associated with a specific potency and the probiotic product must be consumed live and at this potency.

2) Are probiotics with more bacteria the most effective?

Not necessarily 

A higher number of CFUs does not necessarily equal a superior effect. Instead, choosing a probiotic product at an appropriate CFU level, which is clinically associated with the desired effect is the best option. For example, Bifidobacterium, BB-12® has been associated with a increased defecation frequency in adults with constipation just as well at a dose of 1 billion CFU/day as with 10 billion CFU/day,1 whilst a beneficial effect of Lactobacillus, LGG® at a level of 10 billion CFU has been observed in several studies,2, 3 and therefore supplementation with Lactobacillus, LGG® at 10 billion CFU/day is often recommended, due to its association with reduced duration of gastroenteritis in infants and children.4

3) Do probiotic products with multiple strains have the most success?

Not necessarily

The number of strains in a probiotic product does not determine its functionality; the particular strain, the specific combination, and the clinical evidence is what should be considered, as many available multi-strain products lack clinical support for either the single strains they contain, or the combination of strains used. For example, Lactobacillus, LGG® as a single-strain product has been associated with beneficial immune system support,5, 6, 7 Lactobacillus rhamnosus, GR-1® and Lactobacillus reuteri, RC-14® in combination have been shown to help support urogenital health,8, 9, 10, 11, 12 and the combination of Bifidobacteria, BB-12®, Bifidobacteria infantis Bb-02 and Streptococcus thermophilus, TH-4® has been associated with reduced necrotizing enterocolitis in very preterm infants.13

Lactobacillus acidophilus lactobacillus rhamnosus and lactobacillus reuteri

4) Do all fermented foods contain probiotic bacteria?

No

Since fermented foods are developed by using existing microbes or adding a live culture to a food, they contain live microbes. Often, however, a fermented food will go through further processing such as pasteurization, baking and filtering, thus killing the live microbes. Even if a fermented food does not go through one of these processes, it is still not necessarily termed a probiotic, as it may not have documented health benefits, or a specific potency associated with its consumption.

5) Do all yogurts contain probiotics?

Not all yogurts do

Yogurts can be a good source of probiotics but not all yogurts contain probiotics. All yogurts contain starter cultures (such as Streptococcus thermophilus and Lactobacillus bulgaricus), but only some yogurts include probiotic bacteria. Several yogurts have probiotic bacteria added together with the fermenting culture in order to ensure that the right amount of specific bacteria is present in the yogurt at the end of shelf life. Probiotic bacteria such as Bifidobacteria, BB-12®, Lactobacillus acidophilus, LA-5®, Lactobacillus rhamnosus, LGG® or Lactobacillus paracasei, L. CASEI 431® can be delivered in adequate amounts in yogurt which then qualifies the yogurt as a source of probiotic bacteria.

6) Can probiotic products be used whilst taking antibiotics?

Yes

Probiotics can help restore the microbiota when negatively affected by antibiotic use. Probiotcs may also be able to help address potential side effects of antibiotics  - Lactobacillus rhamnosus, LGG® has been associated with reducing the frequency of antibiotic-associated diarrhea,14, 15 whilst combining antibiotic treatment with Lactobacillus rhamnosus, GR-1® and Lactobacillus reuteri RC-14® has been associated with improved result with respect to bacterial vaginosis, compared to treatment with antibiotics alone.8, 16 When combining antibiotic treatment with probiotic supplementation, it is recommended that the probiotics are taken a few hours after the antibiotics in order to optimize the effect.

7) Have probiotic strains been clinically studied?

Yes, some have

The clinical effect of some different probiotic strains has been studied in human clinical trials; however, these results cannot be extrapolated to all probiotic strains and products, therefore, caution must be exercised when choosing a probiotic product.

Click to read more about what to look for when choosing a probiotic product

 You can also read about the extensively studied Chr. Hansen strains here.

LGG®, GR-1®, BB-12®, RC-14®, TH-4®, and L.CASEI 431® are registered trademarks of Chr. Hansen A/S.

The article is provided for informational purposes regarding probiotics and is not meant to suggest that any substance referenced in the article is intended to diagnose, cure, mitigate, treat, or prevent any disease.

Reference list

1.Eskesen D, et al. Effect of the probiotic strain Bifidobacterium animalis subsp. lactis, BB-12®, on defecation frequency in healthy subjects with low defecation frequency and abdominal discomfort: a randomised, double-blind, placebo-controlled, parallel-group trial. Br J Nutr. 2015;114(10):1638-46. (PubMed)
2.Isolauri E, et al. A human Lactobacillus strain (Lactobacillus casei sp strain GG) promotes recovery from acute diarrhea in children. Pediatrics. 1991;88(1):90-7. (PubMed)
3.Sindhu KN, et al. Immune response and intestinal permeability in children with acute gastroenteritis treated with Lactobacillus rhamnosus GG: a randomized, double-blind, placebo-controlled trial. Clin Infect Dis. 2014;58(8):1107-15. (PubMed)
4.Merenstein D, et al. World Gastroenterology Organisation Global Guidelines - Probiotics and prebiotics. World Gastroenterology Organisation. 2017.
5.Davidson LE, et al. Lactobacillus GG as an immune adjuvant for live-attenuated influenza vaccine in healthy adults: a randomized double-blind placebo-controlled trial. Eur J Clin Nutr. 2011;65(4):501-7.(PubMed)
6.Hojsak I, et al. Lactobacillus GG in the prevention of nosocomial gastrointestinal and respiratory tract infections. Pediatrics. 2010;125(5):e1171-7. (PubMed)
7.Hojsak I, et al. Lactobacillus GG in the prevention of gastrointestinal and respiratory tract infections in children who attend day care centers: a randomized, double-blind, placebo-controlled trial. Clin Nutr. 2010;29(3):312-6. (PubMed)
8.Anukam K, et al. Augmentation of antimicrobial metronidazole therapy of bacterial vaginosis with oral probiotic Lactobacillus rhamnosus GR-1 and Lactobacillus reuteri RC-14: randomized, double-blind, placebo controlled trial. Microbes Infect. 2006;8(6):1450-4. (PubMed)
9.Beerepoot MA, et al. Lactobacilli vs antibiotics to prevent urinary tract infections: a randomized, double-blind, noninferiority trial in postmenopausal women. Arch Intern Med. 2012;172(9):704-12. (PubMed)
10.Martinez RC, et al. Improved treatment of vulvovaginal candidiasis with fluconazole plus probiotic Lactobacillus rhamnosus GR-1 and Lactobacillus reuteri RC-14. Lett Appl Microbiol. 2009;48(3):269-74. (PubMed)
11.Petricevic L, et al. Randomized, double-blind, placebo-controlled study of oral lactobacilli to improve the vaginal flora of postmenopausal women. Eur J Obstet Gynecol Reprod Biol. 2008;141(1):54-7. (PubMed)
12.Reid G, et al. Nucleic acid-based diagnosis of bacterial vaginosis and improved management using probiotic lactobacilli. J Med Food. 2004;7(2):223-8. (PubMed)
13.Jacobs SE, et al. Probiotic effects on late-onset sepsis in very preterm infants: a randomized controlled trial. Pediatrics. 2013;132(6):1055-62. (PubMed)
14.Arvola T, et al. Prophylactic Lactobacillus GG reduces antibiotic-associated diarrhea in children with respiratory infections: a randomized study. Pediatrics. 1999;104(5):e64. (PubMed)
15.Vanderhoof JA, et al. Lactobacillus GG in the prevention of antibiotic-associated diarrhea in children. The Journal of Pediatrics. 1999;135(5):564-8. (PubMed)
16.Martinez RC, et al. Improved cure of bacterial vaginosis with single dose of tinidazole (2 g), Lactobacillus rhamnosus GR-1, and Lactobacillus reuteri RC-14: a randomized, double-blind, placebo-controlled trial. Can J Microbiol. 2009;55(2):133-8. (PubMed)

Lactobacillus acidophilus lactobacillus rhamnosus and lactobacillus reuteri

What to  look for

See key tips on how to choose a high-quality probiotic product

Clinical  studies

Learn how to review the evidence when considering probiotic strains and effects

Our strains

Read more about some of the world’s most documented probiotic strains and their diverse, beneficial health effects

Lactobacillus acidophilus lactobacillus rhamnosus and lactobacillus reuteri

Is Lactobacillus rhamnosus the same as Lactobacillus reuteri?

The key difference between Lactobacillus rhamnosus and Lactobacillus reuteri is that Lactobacillus rhamnosus is a bacterial species that may sometimes be pathogenic in people who have weakened immunity and infants, while Lactobacillus reuteri is a bacterial species that is generally non-pathogenic.

Which Lactobacillus is best for gut health?

Some of the best probiotic strains for health include: Lactobacillus acidophilus. Lactobacillus acidophilus balances potentially harmful bacteria that can otherwise grow in your gut due to illness or antibiotics. Lactobacillus fermentum.

What is Lactobacillus reuteri good for?

Generic Name: Lactobacillus reuteri Probiotics are used to improve digestion and restore normal flora. Probiotics have been used to treat bowel problems (such as diarrhea, irritable bowel), eczema, vaginal yeast infections, lactose intolerance, and urinary tract infections.

Can you take 2 types of probiotics at the same time?

It's absolutely OK to take multiple probiotic supplements at the same time, says Singh. But you may want to look into trying supplements with different strains to target various needs within the gut. * Otherwise, taking just one multistrain probiotic supplement will serve the same purpose.