Supported by more than 15 clinical trials

Identified and commercialised in 1998, the Lab4 probiotics consortium contains four proprietary bacteria strains – Lactobacillus acidophilus CUL60, Lactobacillus acidophilus CUL21, Bifidobacterium animalis subsp. lactis CUL34 and Bifidobacterium bifidum CUL20.

The Lab4 probiotics blend is supported by more than 15 clinical trials and a number of in vitro and in vivo studies across a wide range of conditions at doses ranging from 12.5 billion CFUs to 50 billion CFUs per day. The conditions studied to date include C. difficile, using probiotics alongside antibiotics, irritable bowel syndrome (IBS), immunity, upper respiratory tract infection (URTI), mood and performance.


The IBS in Women Study

A double-blind, randomized, placebo-controlled study assessing the impact of probiotic supplementation on the symptoms of irritable bowel syndrome in females


The ProChild & ProChild-2 Studies: Preschool children

The impact of probiotics and vitamin C on the prevention of upper respiratory tract symptoms in two preschool children cohorts


The ProChild-2 Study: Antibiotic prescriptions

Probiotics with low dose vitamin C reduce antibiotic prescriptions in children: A secondary analysis of a multicentre randomised double-blind placebo-controlled trial


The Probiotics and Healthy Adult Study

The gastrointestinal status of healthy adults: a post hoc assessment of the impact of three distinct probiotics


The ProChild-2 Study

Probiotics with vitamin C for the prevention of upper respiratory tract symptoms in children aged 3-10 years: a randomised controlled trial


The Cycling Endurance Study

Probiotic supplementation increases carbohydrate metabolism in trained male cyclists: a randomised, double-blind, placebo-controlled cross-over trial


Lab4 Consortia and Neuroprotection

In vitro neuroprotective activities of two distinct probiotic consortia


The Marathon Endurance Study

Four weeks of probiotic supplementation reduces GI symptoms during a marathon race


Lab4 and Cholesterol Study

The anti-cholesterolaemic effect of a consortium of probiotics: an acute study in C57BL/6J mice (Part 1)


Lab4 and Memory Improvement Study

Long-term multi-species Lactobacillus and Bifidobacterium dietary supplement enhances memory and changes regional brain metabolites in middle-aged rats


The Ultra-marathon Endurance Study

Efficacy of Lab4 probiotics in the Marathon des Sables


The Hertfordshire Study

An exploratory investigation of endotoxin levels in novice long distance triathletes, and the effects of a multi-strain probiotic/prebiotic/antioxidant intervention


The ProChild Study

Probiotics and vitamin C for the prevention of respiratory tract infections in children attending preschool; a randomised controlled pilot study


Running to Exhaustion Study

Effects of probiotics supplementation on gastrointestinal permeability, inflammation and exercise performance in the heat


The Keele Study

A double-blind, placebo-controlled, randomised pilot trial examining the effects of probiotic administration on mood and cognitive function


The Cambridge IBS Study

Effects of probiotics on the caecal and faecal microbiota of irritable bowel syndrome patients receiving antibiotics: a pilot study


The Adult Immune Response Study

Probiotic supplement consumption alters cytokine production from peripheral blood mononuclear cells: a preliminary study using healthy individuals


The Cardiff Tracking Study

Use of colony-based bacterial strain typing for tracking the fate of Lactobacillus strains during human consumption


The Sheffield IBS Trial

Clinical trial: a multistrain probiotic preparation significantly reduces symptoms of irritable bowel syndrome in a double-blind placebo-controlled study


The Cambridge Probiotic/Antibiotic Trial 2

Effects of probiotics on the composition of the intestinal microbiota following antibiotic therapy


The Cambridge Probiotic/Antibiotic Trial 1

Effect of probiotics on preventing disruption of the intestinal microflora following antibiotic therapy: a double-blind, placebo-controlled pilot study


The Cambridge Clostridium difficile Study

Clostridium difficile pilot study: effects of probiotic supplementation on the incidence of C. difficile diarrhoea

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