S. boulardii

The Yeast Probiotic


Our S. boulardii, a yeast probiotic, is sourced from Italy and manufactured in the United States.

Benefits of S. boulardii

Our Honest Assessment

Emerging Research

Several clinical studies and experimental studies have suggested the benefit S. boulardii has on the functioning of the gastrointestinal tract. Though its use as a therapy is fairly recent, it is valued for its probiotic qualities.

Supports digestion

Saccharomyces boulardii is a probiotic yeast that colonizes the intestine for digestive support. Saccharomyces boulardii supports gastrointestinal function in cases when there is a disturbance to the normal balance of gut flora.*

View Research

Research by the Numbers

Number of studies


Double-blind placebo


Number of volunteers


Years of studies


Dosage of studies


Our S. boulardii

Sourced from Italy

Our S. boulardii is a single-strain yeast probiotic sourced from Italy. It uses a proprietary strain identified with advanced genetic techniques. A patented drying process is then used to create the supplement, rather than the commonly used freeze-drying treatment that damages the integrity of the yeast.

Manufactured in the U.S.

After it is dried, our yeast product is encapsulated and tested to ensure its quality and antimicrobial activity levels.

S. boulardii

The Yeast Probiotic


Packaged in a shared facility with Wheat, Milk, Soy, and Salmon following current Good Manufacturing Practices (cGMP).

We recommend that you consult your doctor prior to use if you are considering taking dietary supplements for the first time, or are pregnant, nursing, taking any medications, or have any medical condition.

Store product in a cool and dry place. Keep out of reach of children. If you experience an adverse event or allergic reaction, discontinue use immediately and contact a healthcare professional.

What quality means to us:

Learn More
  1. We start at the source.

    We've traveled the globe to source our ingredients from the regions where they are cultivated best.

  2. We produce with care.

    We ferment our vitamins for easy digestion and avoid harsh solvents in the extraction process of our herbs.

  3. We test, vet and repeat.

    All raw materials and finished products are thoroughly tested in the United States.

  4. We show our work.

    We’re transparent on ingredient sourcing, manufacturing locations and testing.