Lactobacillus rhamnosus GG supplements overview
Lactobacillus rhamnosus GG (L. rhamnosus GG) is one of the best-studied probiotics strains in the world with over 30 years of scientific research demonstrating its safety and effectiveness. It was first discovered in 1983 by researchers Sherwood Gorbach and Barry Goldin, the ‘GG’ is derived from the first letter of their surnames in honour of their discovery.

You will often see it also abbreviated to Lactobacillus GG or commonly referred to as “LGG” in conversation.
After the L. rhamnosus GG strain was originally isolated and discovered in a healthy human digestive tract, it was further patented in 1989. Today, we can find it in several fermented foods and in probiotic supplements.
When it comes to understanding the world of probiotics it can be like completing a Rubik’s cube blindfolded. There are so many available that we can get truly overwhelmed by which to choose, why and when to take it.
What does Lactobacillus rhamnosus GG do?
When we introduce a probiotic as a supplement to our diet, it is important that the bacteria strain can pass through the hostile environment of the stomach and small intestine. Thankfully, L. rhamnosus GG is a probiotic that is resistant to our gastric and bile acids and can survive the journey to the lower digestive tract and work where we need it most.
As it travels down the GI tract, L. rhamnosus GGstarts to take up residence (colonise) the intestinal walls in the human gut by implanting in the mucus protecting the epithelial cells. The epithelial cells form the intestinal barrier (gastrointestinal mucosa) also known as the gut lining, which is the largest barrier surface in the body, it is also one of our first lines of defence.
One of its main functions is to protect us from pathogens, microbes, and antigens. This barrier acts as a very dynamic filter, only allowing in safe substances such as nutrients, whilst expressly limiting harmful organisms and toxins.
- rhamnosus GG is also able to support the generation of a biofilm on the mucosa surface which is a living community of microorganisms that protect and preserve its viability whilst resident in the gut .
Lactobacillus rhamnosus GG benefits
Research has shown that L. rhamnosus GG has beneficial effects on human health by –
- Its ability to produce natural antibacterial substances that help to protect us from infections
- Producing mucins that create a healthy mucus layer which we need to help protect the intestinal lining and provide lubrication for the passage of food as well as help to protect us from invading pathogens
- Inhibiting local and systemic inflammation and therefore helping to prevent intestinal inflammatory disorders
- Inhibiting tumour formation
- Reducing the risks or severity of allergies
- Helping to regulate our immune system and much more
Whilst this intestinal barrier is very protective for us, it can be weakened and disrupted by various factors including –
- Nutritional deficiencies such as Vitamin A, D & Zinc.
- Alcohol
- Poor diet
- Some medications
- Smoking
- Stress
- Coeliac disease and other diseases such as Non-Alcoholic Fatty Liver Disease
What conditions does Lactobacillus GG help with?
Numerous research has found that Lactobacillus GG is not only gut supportive but helps other organs and systems such as –
Digestive health.
Immune support.
IBS management.
Allergy/sensitivity prevention.
Skin health.
Vaginal health.
Prevention and treatment of diarrhoea.
Blood sugar management and more.
How to take and store Lactobacillus rhamnosus GG
Lactobacillus rhamnosus GG is hardier than other lactobacilli strains and can remain stable at room temperature or just slightly below before being ingested. However, it is advised to be stored away from direct sunlight and heat.
Its microbial count of 25 billion CFUs, refers to the time of ingesting it and not at the time of manufacturer like some probiotics are which start to diminish in numbers before we have even swallowed it!
Lactobacillus rhamnosus GG probiotic is a great travel companion for those who are suspectable to diarrhoea and other digestive upsets when away from home.
Dosages can vary depending on age and needs, a general adult daily dose of 25 billion CFUs can be supportive. It is suitable for both adults and children.

If you want to feel ‘Gut-tastic’ Allergy Research Essential-Biotics L.Rhamnosus GG is dairy, gluten and allergen free and suitable for vegans.