Lactobacillus rhamnosus GR-1 is a lactic acid bacteria from the genus Lactobacillus and the species rhamnosus. Like other Lactobacillus rhamnosus, it is a Gram-positive, rod-shaped bacterium which does not produce spores and is not capable of moving itself with flagella.
L. rhamnosus GR-1 was isolated from the urethra of a healthy woman. The urethra is a tube that connects the urinary bladder to the urinary meatus for the removal of fluids (urine) from a woman's body. Dr. Gregor Reid and Dr.
Andrew Bruce at Urex Biotech discovered and developed Lactobacillus
rhamnosus, GR-1® and then sold the
rights to Chr. Hansen of Denmark.
The Lactobacillus rhamnosus species as a whole are listed on the European QPS (Qualified Presumption of Safety) list. Lactobacillus bacteria as a whole are considered to be routinely encountered in the environment, in fermented foods and drinks, and are frequently isolated from feces. Unless a person is immune-compromised, Lactobacillus are generally considered safe. If you ever have any questions about your immune status, please talk with your doctor.
Coming soon! For more information on the specifics of the probiotic Lactobacillus rhamnosus GR-1, including details of what studies have shown for the strain and at which dosages and duration, download "The Lactobacillus rhamnosus GR-1 Guide."
L. rhamnosus GR-1 is available, combined with Lactobacillus reuteri RC-14, in products such as Fem-Dophilus® and RepHresh Pro-B®. Always read ingredients prior to purchasing.
In Fem-Dophilus® , the recommended dosage is one capsule per day for
maintenance with 2.5 billion cfu of each strain per capsule. Increase to
two(2) capsules a day as needed, or use as directed by your qualified
health care consultant. Fem-Dophilus® is marketed by Jarrow and is
recommended to be refrigerated.
RepHresh Pro-B (clinically called
Urex-Cap-5) is marketed by Lil’ Drug Store Products, Inc and contains 2.5 billion each of GR-1 and RC-14. The recommended dosage is one capsule per day. It can be
stored at room temperature, but I’d recommend refrigeration if possible
to prolong microbe life.
More about Lactobacillus rhamnosus is found here.
More about Lactobacillus is on this page.
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