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Lactobacillus rhamnosus is a species of probiotic bacteria. In this article you will find the answers to the following questions about L. rhamnosus.
Lactobacillus rhamnosus is a bacterial species belonging to the Lactobacillus genus that was originally considered to be a subspecies of Lactobacillus casei; however, further genetic research determined that Lactobacillus rhamnosus was a separate species. Lactobacillus rhamnosus bacteria typically exist in the human digestive system, but Lactobacillus rhamnosus strains are also known to colonise in the vaginal environment. The bacteria from this species are often found in chains, and are gram positive, anaerobic and rod shaped. Other strains from the species are found in fermented foods such as yoghurt and other dairy products, especially semi-hard cheeses.
As of April 2020 L. rhamnosus has been officially reclassified to Lacticaseibacillus rhamnosus (Zheng J et al., 2020).
Lactobacillus rhamnosus has been the focus of many research projects with some strains showing to be particularly beneficial for supporting female intimate health conditions. These certain strains of L. rhamnosus support vaginal health in the following ways:
You can read more about this in our article on our sister site, Probiotics Learning Lab: Probiotics and bacterial vaginosis
Lactobacillus rhamnosus also supports digestive and immune health in the following ways:
You can find more information on how probiotics can aid immune function in this article on the Probiotics Learning Lab: Could live cultures help allergies?
Numerous probiotics contain L. rhamnosus, but one of the most researched strains is Lactobacillus rhamnosus LGG® . This strain has been involved in over 800 studies worldwide and found to be beneficial for both adults and children, particularly for IBS, eczema, allergies and supporting the immune system.
Products containing Lactobacillus rhamnosus strains can be found in Optibac Probiotics.
There are many other species in the Lactobacillus genus – read about these in the Probiotics Database
Lactobacillus rhamnosus strains: Lactobacillus rhamnosus LGG®, Lactobacillus rhamnosus HN001, Lactobacillus rhamnosus GR-1® and Lactobacillus rhamnosus Rosell-11.
For more insights and professional updates on probiotics, please visit the Probiotic Professionals pages.
Lactobacillus rhamnosus GG (ATCC 53103) and its Probiotic Use. MicrobeWiki [ONLINE] Available at: https://microbewiki.kenyon.edu/index.php/Lactobacillus_rhamnosus_GG_(ATCC_53103)_and_its_Probiotic_Use. [Accessed 8 June 2017].
Lee Y. and Salminen S., (2009), Handbook of Probiotic and Prebiotics. 2nd edition, Hoboken: John Wiley & Sons.
Lin PW, Myers LES, Ray L, et al. Lactobacillus rhamnosus blocks inflammatory signaling in vivo via reactive oxygen species generation. Free Radic Biol Med. 2009;47(8):1205-1211. doi:10.1016/J.FREERADBIOMED.2009.07.033
Reid G., (1999), ‘The scientific basis for probiotic strains of Lactobacillus’. Applied and Environmental Microbiology, 65(9):3763-3766.
Zheng J, Wittouck S. et al., (2020) 'A taxonmonic note on the genus Lactobacillus: Description of 23 novel genera, emended description of the genus Lactobacillus Beijerinck 1901, and union of Lactobacillaceae and Leuconostocaceae'. Int.J.Syst.Evol.Microbiol, 70(4): 2782-2858. DOI: 10.1099/ijsem.0.004107
Information on this species was gathered by Joanna Scott-Lutyens BA (hons), DipION, Nutritional Therapist; and Kerry Beeson, BSc (Nut.Med) Nutritional Therapist.