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Science Behind

Everything We Do

We are yeast-based probiotics powered by S. boulardii celebrating 100 years of scientifically demonstrated efficacy.

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100+ Clinical studies

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Tested for safety

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100 Years of research

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Clean formula

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Liiv product made in canada by a global leader since 1934


the power of Liiv

Boulardii Boulardii image mobile

Liiv Everyday
Powered by S. boulardii

Did you know?

S. boulardii is the 1st probiotic yeast​! It has a complementary mode of action with probiotic bacteria​. It’s strongly recommended by healthcare practitionners​ due to its proven efficacy and scientifically demonstrated effects.

100 +

Clinical studies


Years of efficacy


Pure ingredients

Numbers of days

Ocassional diarrhea duration with S. boulardii intake
Ocassional diarrhea duration without S. boulardii intake

Shown to reduce occasionnal diarrhea duration by approximately 1 day.(1)

Recommended by healthcare practitioners.

1) Hojsak, 2018. Guidance on the use of probiotics in clinical practice in children with selected clinical conditions and in specific vulnerable groups. Acta Pædiatrica.107(6):927-937.​

Ideal for use during or changes to your daily routine during travel

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*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.

  • Assist individuals with occasional diarrhea*​
  • Support natural defenses*
  • Support the immune system and promote digestive health*​​
  • Contributes to normal bowel motility*
  • Support the production of secretory IgA in the gut*​

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.

Rosella Rosella image mobile

Liiv Women's
Powered by ROSELLA*

Rosella is one of the most studied probiotic for vaginal health.

It has a human origin, isolated from a healthy vaginal flora.

It's been shown to be an effective and on-the-go solution by oral intake thanks to its fascinating passage from gut to vagina.


Study showed that ...

This study was conducted on 93 healthy women WITH oCcasional VAGINAL MICROFLORA Imbalance.(1)

Healthy vaginal flora percentage %

% of Healthy Flora after taking RosellA
% of Healthy Flora before taking RosellA

after 45 days, NORMAL VAGINAL FLORA significantly increased FROM 44% TO 87% BY TAKING ROSELLA PROBIOTIC.

RosellA decreased redness severity by 26% AFTER 45 DAYS AND BY 33% AFTER 90 DAYS.

RosellA decreased swelling severity by 28% AFTER 45 DAYS AND 90 DAYS.

* L. plantarum P17630 (Proge P17630®), ROSELLA, licensed from PROGE FARM®, Italy.

(1) R. Vladareanu and all (2018). “New evidence on oral L. plantarum P17630 product in women with history of recurrent vulvovaginal candidiasis (RVVC): a randomized double-blind placebo-controlled study” Eur Rev Med Pharmacol.

Percentage %


T45 - after 45 days of taking the probiotic

T90 - after 90 days of taking the probiotic

Mood Mood image mobile

Liiv Mood
Powered by Cerebiome®

Helps moderate occasional feelings of stress.

Cerebiome® is clinically proven to offer natural support to help enhance mood and help in times of occasional stress. It acts on the microbiome-gut brain axis to support a healthy response to everyday stress without side effects.

Cerebiome® significantly promotes intestinal comfort by 25.9% and decreases nausea and vomiting by 8%.(2)

Stress percentage %

Stress % before taking Cerebiome®

Stress % after taking Cerebiome®

Promotes gastrointestinal comfort in occasional stressful times.

Cerebiome® significantly decreases the feelings of everyday stress by 44% and supports healthy cortisol (stress hormone) levels.(1)

(1) Messaoudi et al. (2010). Assessment of psychotropic-like properties of a probiotic formulation (Lactobacillus helveticus R0052 and Bifidobacterium longum R0175) in rats and human subjects. British Journal of Nutrition, 105(5), 755-764.

(2) Diop et al. (2008). “Probiotic food supplement reduces stress-induced gastrointestinal symptoms in volunteers: a double-blind, placebo-controlled, randomized trial.” Nutrition Research 28(1): 1-5.

Meet the best-in-class psychobiotic

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Cerebiome® is an innovative formula for the gut-brain axis answering both consumers’ needs and health authorities’ requirements.

  • Made with two live probiotic bacterial strains Lactobacillus helveticus Rosell®-52 and Bifidobacterium longum Rosell®-175 with complementary modes of action.​
  • Established formula commercially available since 2006.
  • Product safety is backed by a long history of safe use and in-house safety program.​​