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Clinical Research

Scientific Studies on Probaclac

Clinically proven probiotic formulas. Discover the double-blind, randomized, controlled studies that demonstrate the efficacy of our products.

Clostridium
difficile
0

CDAD Reduction
in Hospital Settings

Diarrhea and Antibiotics
0

Risk Reduction
with Supplementation

Bacterial
Vaginosis
0

Reduction in Recurrence
of Bacterial Vaginosis

Yeast
Infection
0

Women Relapse-Free
After 4 Months

Irritable Bowel
Syndrome
+33%

Stool Frequency
in Constipation

Irritable Bowel
Syndrome
-21%

Stool Frequency
in Diarrhea

01 Clostridium difficile - Santa Cabrini Hospital Study

Clostridium difficile is a bacterium that normally resides harmlessly in the intestines of about 5% of the population. Following antibiotic treatment, the bacterial colonization in the intestines decreases, which promotes the proliferation of C. difficile. Once established, the bacteria produce toxins that can damage the intestine and cause diarrhea.

Clostridium difficile-associated diarrhea (CDAD) represents the leading cause of nosocomial infectious diarrhea.

61% Reduction in C. difficile
61% Reduction in C. difficile Infections - Santa Cabrini Hospital

Generally, affected individuals recover with antibiotic treatment, although research estimates that initial treatment fails in more than 20% of patients. Individuals undergoing antibiotic therapy are 7 to 10 times more likely to suffer from the infection.

-61%
The administration of Probaclac probiotics as a preventive measure reduced CDAD by 61% at Santa Cabrini Hospital in Montreal. Study conducted over 8 months with 5,000 patients, double-blind and independently of Laboratoires Nicar.

Individuals in hospital settings or nursing homes are an at-risk population. Blood, mucus, or pus may also be found in the stool.

Study on Probaclac Adults:

↓ Important risk reduction in nosocomial C. difficile with institution of probiotic prophylaxis - Download

02 Probaclac Medic - S. boulardii

Broad-spectrum antibiotics act against a large number of bacteria without distinguishing between pathogenic bacteria and the beneficial bacteria residing in the intestinal flora. The resulting intestinal bacterial imbalance can lead to antibiotic-associated diarrhea (AAD).

Several studies have confirmed the efficacy of the probiotic yeast Saccharomyces boulardii in preventive treatment. This probiotic cannot be affected by antibiotics and helps restore the intestinal flora.

-86%
A randomized, double-blind controlled study of 151 hospitalized adult patients: the placebo group developed diarrhea at a rate of 9%, while the supplemented group had a rate of 1.4% — an 86% decrease.
86% Reduction in Diarrhea
86% Reduction in AAD with S. boulardii - Double-Blind Study

The beneficial effect was also reproduced in a randomized, double-blind controlled trial with 269 children aged 6 months to 14 years. The Probaclac Medic formula contains 5 billion active cells per capsule.

Studies on Probaclac Medic:

↓ S. boulardii in prevention of antibiotic-associated diarrhoea in children ↓ Prophylactic S. boulardii in prevention of antibiotic-associated diarrhea

03 Probaclac GI - Lactobacillus rhamnosus GG

Recommended for preventing antibiotic-associated diarrhea, Lactobacillus rhamnosus GG significantly reduces the risk of developing antibiotic-associated diarrhea.

-88%
Lactobacillus rhamnosus GG has clinically demonstrated its ability to promote the growth of friendly bacteria. The GG strain has the natural capacity to survive gastric acidity and act as a barrier against pathogenic bacteria.
88% Reduction - Lactobacillus GG
88% Reduction with L. rhamnosus GG
Lactobacillus GG Chart
Clinical Efficacy of the GG Strain

Infectious diarrheas are acute diarrheas. The WHO defines them as the passage of at least 3 loose to liquid stools per day for less than 2 weeks. Studies suggest that intestinal balance can be restored through rehydration and probiotic supplementation.

Clinical data on GG has proven its ability to reduce the incidence and duration of diarrhea episodes caused by viral or bacterial infections.

Studies on Probaclac GI:

↓ Effect of oral Lactobacillus GG on antibiotic-associated GI side-effects ↓ Effect of different probiotic preparations on anti-H. pylori therapy ↓ Effect of Lactobacillus GG supplementation - Pilot study

04 Probaclac Vaginal - Bacterial Vaginosis

The vaginal flora is composed of a collection of microorganisms including a very large number of lactobacilli bacteria, called the Döderlein flora, which represents approximately 95% of the vaginal ecosystem. The beneficial bacteria form a protective biofilm on the vaginal mucosa.

The protective effect of lactobacilli involves various actions: they inhibit the growth of pathogenic bacteria by secreting a variety of substances and they interfere with their adhesion to vaginal epithelial cells.

-84%
A study of 120 women with a history of recurrent bacterial vaginosis demonstrates that the insertion of probiotics into the vaginal cavity reduces the recurrence of bacterial vaginosis by more than 84%.
84% Reduction in Bacterial Vaginosis
84% Reduction in BV Recurrence
Probaclac Vaginal Study
Clinical Results - Probaclac Vaginal

The Probaclac Vaginal formula contains 8 billion bacteria from 3 different strains and helps regulate the Döderlein flora by repopulating it.

Causes that can lead to an imbalance:

Hormonal changes (pregnancy)
Antibiotic therapy
Excessive vaginal hygiene
Sexual intercourse
Stress
Tobacco

Bacterial vaginosis is an imbalance that can be caused by the proliferation of bacteria such as Gardnerella vaginalis or Prevotella. This change involves an increase in the normally acidic vaginal pH. This infection is asymptomatic in half of the women affected.

Bacterial Vaginosis Diagram
Mechanism of Bacterial Vaginosis and Role of the Döderlein Flora

Study on Probaclac Vaginal:

↓ Efficacy of vaginal probiotic capsules for recurrent bacterial vaginosis

05 Recurrent Vulvovaginal Candidiasis

L. Plantarum Rosella is a unique strain isolated from a healthy vaginal flora, supported by comprehensive mechanistic and clinical evidence. Studied in more than 800 women across 6 clinical studies, it demonstrates its efficacy in maintaining optimal vaginal balance and managing recurrent vulvovaginal candidiasis (rVVC).

91%
of women had no relapse after 4 months of follow-up in the Carriero (2007) study involving 476 women with vulvovaginal candidiasis.
Clinical Strain
800+ women studied
across 6 trials

This strain is derived from a healthy human vaginal flora. The data documents both the maintenance of vaginal balance, recurrent vulvovaginal candidiasis, and the improvement of symptoms observed after treatment.

Human Origin strain isolated from a healthy vaginal flora
Documented Action pH, symptoms, recolonization, and relapses
Clinical Use as an adjunct to antifungal treatment
Key Points
  • 6 clinical studies, including 4 via vaginal route
  • contributes to vaginal health in cases of recurrent VVC
  • normalizes pH and promotes a flora associated with vaginal health
  • adhesion and interference with Candida albicans observed in vitro

This strain demonstrates strong inhibitory activity against E. coli and K. pneumoniae, and intermediate activity against P. mirabilis. These bacteria are involved in several urinary and vaginal infections.

Nava 2002 - pH and Symptom Reduction

Study of 30 women with bacterial or fungal vaginitis, 6 days of intake followed by 9 days of follow-up.

T7 / T15
Itching Burning Edema Erythema Leucorrhea pH 5.3 5.0 4.9
Baseline Day 7 Day 15 pH
Carriero 2007 - Relapse-Free Maintenance

After oral fluconazole pre-treatment, three monthly cycles at the end of the menstrual period.

4 semaines / 4 mois
4 Weeks 4 Months 83% 17% 91% 9%
No Relapse Relapse
90% perceived symptom improvement

Observed in the De Seta 2014 study, versus 68% in the comparator group.

80% high levels of lactobacilli

After 90 days, versus 40% in the comparator group.

83.3% reported clinical resolution

In the Cianci 2016 study, versus 47.8% in the control group.

Summary of Vaginal Studies

Clinical Summary Table
Year / Author
Condition
N
Regimen
pH
Symptoms
Persistence
Cianci 2016
BV and/or AV
94
6 consecutive days then 1 capsule the following week
Not Tested
Not Tested
De Seta 2014
VVC
80
6 consecutive days then 1 capsule per week for 4 weeks
Not Tested
Carriero 2007
VVC
476
3 months: 6 days of intake at the end of the menstrual cycle
Nava 2002
VVC or BV
30
6 days of intake / 9 days of follow-up
Nava 2002
VVC
30
6 days per month + 3 months of follow-up
Cianci 201694 participants
ConditionBV and/or AV
Regimen6 consecutive days then 1 capsule the following week
pH Not TestedSymptoms ✓Persistence Not Tested
De Seta 201480 participants
ConditionVVC
Regimen6 consecutive days then 1 capsule per week for 4 weeks
pH ✓Symptoms ✓Persistence Not Tested
Carriero 2007476 participants
ConditionVVC
Regimen3 months: 6 days of intake at the end of the menstrual cycle
pH ✓Symptoms ✓Persistence ✓
Nava 200230 participants
ConditionVVC or BV
Regimen6 days of intake / 9 days of follow-up
pH ✓Symptoms ✓Persistence ✓
Nava 200230 participants
ConditionVVC
Regimen6 days per month + 3 months of follow-up
pH ✓Symptoms ✓Persistence ✓

Health claims in Canada: Reduces signs of vulvovaginal candidiasis (VVC). Helps treat recurrent vulvovaginal candidiasis (rVVC)*
*In combination with antifungal treatment

06 L. paracasei HA-196 - Irritable Bowel Syndrome

Lacticaseibacillus paracasei HA-196 is a beneficial bacterium naturally found in the mouth and intestines. It produces lactic acid, helping to lower digestive pH and curb the growth of harmful bacteria. Its ability to adhere to colonic epithelial cells gives it a competitive advantage against pathogens.

+33%
Stool frequency in constipation
-21%
Stool frequency in diarrhea

IBS Study Design

This section captures the spirit of the provided summary boards, but with charts, cards, and layouts entirely redesigned for the Probaclac brand.

Quick Read
251 adults evaluated
over 8 weeks

Participants with IBS-C, IBS-D, or IBS-M subtypes. The randomized, double-blind, placebo-controlled study tracked changes in digestive symptoms and quality of life.

L. paracasei HA-196 10 billion CFU per day for 8 weeks
B. longum Rosell-175 active comparator arm at equivalent dose
Placebo parallel follow-up and reading at week 8
6 Validated Questionnaires
  • IBS-SSS and Bristol Scale
  • IBS-QOL, HADS, SF-36
  • daily symptom diary
Quality of Life - SF-36

Two dimensions stand out at week 8: emotional well-being and social functioning.

SF-36
Well-being Social * * ** *
HA-196 B. longum Placebo
Stool Frequency by IBS Subtype

Simplified reading of IBS-D and IBS-C subgroups between baseline, week 4, and week 8.

Bristol
Baseline Wk. 4 Wk. 8 -21% +33% IBS-D vs placebo IBS-C
HA-196 IBS-C gain placebo
-21% stool frequency in IBS-D

A significant decrease after 8 weeks versus placebo.

+33% stool frequency in IBS-C

Accompanied by a reduction in laxative use.

2 notable SF-36 dimensions

Emotional well-being and social functioning stand out clearly.

HA-196 Clinical Summary
Axis
Observation
Subgroup
Impact
Transit
-21% en IBS-D
IBS-D
More regular bowel habits.
Constipation
+33% en IBS-C
IBS-C
Increased frequency and less reliance on laxatives.
Quality of Life
SF-36 improvement
overall cohort
Better emotional and social well-being.
Methodology
6 validated tools
8 weeks
Robust, multi-dimensional clinical assessment.
TransitIBS-D
Observation-21% en IBS-D
ImpactMore regular bowel habits.
ConstipationIBS-C
Observation+33% en IBS-C
ImpactIncreased frequency and less reliance on laxatives.
Quality of LifeOverall Cohort
ObservationSF-36 Improvement
ImpactBetter emotional and social well-being.
Methodology8 weeks
Observation6 validated tools
ImpactRobust, multi-dimensional clinical assessment.

Demonstrated in vitro antimicrobial activity against E. coli, Salmonella typhimurium, Listeria monocytogenes, Clostridium difficile, Staphylococcus aureus MRSA, and Klebsiella pneumoniae. HA-196 also produces hydrogen peroxide, inhibiting pathogen growth.

Market data: 25% of Canadian consumers suffer from irritable bowel syndrome at least occasionally. Only 42% report being satisfied with their digestive health in 2024, compared to 61% in 2022. 45% would find a supplement bearing the claim "relieves IBS symptoms" appealing.

Health claim in Canada: Clinically proven to reduce discomfort associated with irritable bowel syndrome. For diarrhea (IBS-D): reduces stool frequency by 21%. For constipation (IBS-C): increases stool frequency by 33%. 1 capsule per day, 10 billion CFU.

07 Gastric Acid Resistance

Probaclac probiotic strains survive without enteric coating at pH 3.

Once consumed, probiotics follow the natural path of the digestive tract. Passing through the mouth and then the esophagus, probiotics reach the stomach, a highly acidic environment when empty. Its acidity level varies: on an empty stomach, the pH is approximately 1, and around 6 when full.

The alkalinization of the stomach when it contains nutrients is the reason why it is preferable to take probiotics with food. The number of active bacteria can be affected in an overly acidic environment.

To ensure product efficacy, manufacturers must demonstrate that their probiotic strains can withstand a pH of 3. All Probaclac strains are capable of withstanding this acidity — bacterial viability is assured all the way to the intestines. No enteric coating is needed.

Lactobacillus strains are naturally found in the stomach — the journey therefore presents an opportunity to repopulate this flora.

Gastric Acid Resistance - trajet digestif
Probiotic Digestive Tract Journey - Resistance at pH 3 Without Coating
pH 3
All Probaclac strains withstand a pH of 3 without any enteric coating. The bacteria arrive alive and active in the intestines.