Lactobacillus acidophilus LA-05®

Often studied with B. lactis BB-12®
Especially trialled in regulating bowel function
Shown to improve H. pylori eradication alongside triple therapy

This is a gram positive, non-sporulating, anaerobic, rod shaped bacteria, which is a natural inhabitant of the human gut. Lactobacillus acidophilus LA-05® is known to produce lactic acid, acetic acid and hydrogen peroxide; these metabolites make the intestinal environment less favourable for the growth of potentially pathogenic microorganisms.

It is important to note that this strain has been predominantly trialled alongside Bifidobacterium lactis BB-12®, where it has been shown to help support a variety of different gastro-intestinal symptoms, including those caused by inflammatory bowel disorders. There have also been encouraging results from studies looking at antibiotic-associated side effects; immune function, glucose tolerance and lactose intolerance.

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Lactobacillus acidophilus LA-05® for Diarrhoea

Diarrhoea is a common health problem which can be caused either by food or water infected with pathogens such as Escherichia coli, Salmonella, Shigella or Campylobacter. Several studies have suggested that it may be best to recommend certain probiotic strains over others in order to help alleviate this symptom (McFarland L.V., 2005), and the most extensively researched strains are featured in this database.

In travellers going to Egypt, a probiotic supplement including Lactobacillus acidophilus LA-05® and Bifidobacterium lactis BB-12® significantly decreased the incidence of diarrhoea in the test group compared to the placebo group (Black et al, 1989).

H. pylori bacteria
Diarrhoea may also be caused by antibiotics, which can have an indiscriminate action on the gut flora, wiping out both beneficial and pathogenic bacteria. This disruption may allow pathogenic bacteria to flourish and overgrow, causing unpleasant symptoms such as diarrhoea. The ‘triple-therapy’ antibiotic treatment for H. pylori is particularly harsh on the digestive system, so this was the focus of a study by Sheu et al (2002), where 160 patients infected with H. pylori were randomised into two groups. One group was treated with a triple therapy as well as a probiotic yoghurt containing Lactobacillus acidophilus LA-05® and Bifidobacterium lactis BB-12® (AB-yoghurt), and the other only received the triple therapy. The probiotic group continued to take the yoghurt for four weeks after the triple therapy treatment ceased. Eight weeks later, patients were assessed for the success of H. pylori eradication using stool samples before and after the treatment. The results indicated that the treatment plus yoghurt group had a higher eradication rate for H. pylori than the antibiotic-only group, and showed a restored level of Bifidobacteria in the gut at week five to pre-treatment level (Sheu et al, 2002).

Further Relevant Studies: Black F.T. (1996), Sheu et al (2006), Shioya M, et al (2000a) Shioya M, et al (2000b), Wang et al (2004).

Also relevant: see all strains in the database which have been researched for diarrhoea.

Lactobacillus acidophilus LA-05® for Constipation

The Lactobacillus acidophilus LA-05® and Bifidobacterium lactis BB-12® combination has been shown to help alleviate chronic constipation in elderly patients: in this study, the participants either received unfermented milk or fermented milk containing the probiotics. The group who received the probiotic milk experienced a significant improvement in frequency of bowel movements compared to baseline (Alm L, 1993).

Also relevant: see all strains which have been researched for constipation.

Lactobacillus acidophilus LA-05® for Ulcerative Colitis

A supplement containing Lactobacillus acidophilus LA-05® and Bifidobacterium lactis BB-12® was given daily for 4 weeks to 51 Ulcerative Colitis (UC) patients and 10 patients with Familial Adenomatous Polypeptosis (FAP), all of whom had received ileal-pouch-anal-anastomosis surgery. Symptoms of UC activity were significantly decreased during intervention in the UC group as well as the FAP group. The researchers concluded that this probiotic combination had a positive effect on symptoms and inflammation in UC patients operated on with IPAA (Laake K.O, et al, 2005).

Also relevant: see all strains which have been researched for IBD

Lactobacillus acidophilus LA-05® for Antibiotic Side Effects

Other studies have shown that supplementing with L. acidophilus LA-05® and B. lactis BB-12® can lead to a faster normalisation of the gut flora after taking antibiotics. A double-blind, placebo-controlled study looked at 20 participants who were receiving antibiotics, plus either a placebo or probiotic capsules (4 billion CFU) for 7 days, and then 14 days after antibiotics treatment had ceased. It was found that the intestinal tract recolonised more quickly in the probiotic group than the placebo group. Also, adverse effects of the antibiotics were only seen in 1 person in the probiotic group as opposed to 3 people in the placebo group (Black et al, 1991).

Further relevant studies: Fox et al (2015), Nord CE et al (1997).

Also relevant: see all strains which have been researched for antibiotic side effects.

Lactobacillus acidophilus LA-05® for Lactose Intolerance

The efficacy of the probiotic combination was tested in 50 lactose intolerant adults, who had been on a lactose free diet. The subjects were given probiotic capsules containing the strains Lactobacillus acidophilus LA-05® and Bifidobacterium lactis BB-12®, whilst gradually increasing the amount of lactose in their diet. The results indicated that 80% of the participants considered their well-being either unchanged or improved, rather than feeling the effects of lactose intolerance (Virta et al 1993).

Further relevant studies: Jiang et al (1996), Lin MY (1991).

Also relevant: see all strains which have been researched for lactose intolerance.

Lactobacillus acidophilus LA-05® for Post Colonic Surgery

A total of 39 patients undergoing major elective colonic resection were randomised to receive pre-, peri- and post-operative optimisation or conventional peri-operative care. Optimisation with a probiotic supplement including the strain L. acidophilus LA-05® was associated with a significant shorter hospital stay, quicker recovery of gut function, and shorter requirement for a catheter and intravenous infusion compared to conventional care without (Gatt et al, 2005).

Further relevant studies: Anderson (2004), Sagen (1989), Wildt S, et al. (2006).

Lactobacillus acidophilus LA-05® for Type 2 Diabetes

Type 2 diabetes is often associated with gut dysbiosis. In this trial 50 volunteers with type 2 diabetes were divided into two groups, one group being given a fermented milk containing Lactobacillus acidophilus LA-05® and Bifidobacterium lactis BB-12®, and the other group being a control group who were all given a placebo. Anthropometric measurements, body composition, fasting blood and faecal samples were taken at baseline and after 6 wk. The conclusions were that the probiotic milk benefited those with type 2 diabetes (diabetes mellitus) by improving their glycaemic control, however, the intake of fermented milk also seems to be involved with others metabolic changes, such as decrease in inflammatory cytokines (TNF-α and resistin) and increase in the acetic acid (Tonucci et al, 2017).

Lactobacillus acidophilus LA-05® for Immunity

In-vitro and in-vivo studies have shown that Lactobacillus acidophilus LA-05® can be associated with nonspecific stimulating effects on the production of cytokines and phagocytic activity as well as antibody production (Hatcher, 1993); (Miettinen et al, 1996); (Tejada-Simonet et al, 1999).

Also relevant: see all strains which have been researched for immunity.

This strain is currently not available in the OptiBac Probiotics range.

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Sheu B-S (2006) ‘Pre-treatment with Lactobacillus and Bifidobacterium-containing yogurt can improve the efficacy of quadruple therapy in eradicating residual Helicobacter pylori infection after failed triple therapy’. American Journal of Clinical Nutrition. 83(4):864-869.
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Tejada-Simon MV, et al. (1999) ‘Ingestion of yogurt containing Lactobacillus acidophilus and Bifidobacterium to potentiate immunoglobulin A responses to cholera toxin in mice’. J Dairy Sci. Apr; 82(4):649-60.
Tonucci LB (2017) ‘Clinical application of probiotics in type 2 diabetes mellitus: A randomized, double-blind, placebo-controlled study’. Clinical Nutrition, 36(1):85–92.
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Wildt S, et al. 2006. ‘Probiotic treatment of collagenous colitis: A randomized, double-blind, placebo-controlled trial with L. acidophilus and Bifidobacterium animalis subsp. lactis’. Inflamm Bowel Dis 12 (5): 395-401.

Last updated - 15th September, 2017


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