Saccharomyces Boulardii + MOS 5 Billion CFU | 90 Capsules | Jarrow Formulas

Saccharomyces Boulardii + MOS by Jarrow Formulas

This capsule contains a special yeast. Saccharomyces boulardii is a yeast strain related to the yeast bakers use to make bread rise. Jarrow Formulas combines it with 200 mg of MOS, a fraction derived from yeast cell walls, in each capsule. You get 5 billion colony-forming units per capsule. The bottle contains 90 capsules, providing a three-month supply at one capsule per day.

What Saccharomyces boulardii exactly is

Saccharomyces boulardii is a yeast, not a bacterium. That difference is greater than it sounds. Yeasts are single-celled fungi, just like baker's yeast and brewer's yeast. The strain was described in the 1920s by French researcher Henri Boulard, who found it on the peel of lychees and mangosteens in Southeast Asia. Today, biologists consider it a variant of Saccharomyces cerevisiae, the common baker's and brewer's yeast. That is why the label also says 'an S. cerevisiae strain'. Good to know: because it is a yeast, and not a bacterium, this strain behaves differently from the lactic acid bacteria you find in yogurt.

What MOS means on the label

MOS stands for mannan-oligosaccharides. These are short chains of sugar molecules, mainly mannose, from the yeast cell wall. You can think of it as a type of fiber fraction. This capsule contains 200 mg of a yeast fraction consisting of at least 35% of these mannan-oligosaccharides. This also comes from Saccharomyces cerevisiae. In practice, this means: you get two components of yeast in a capsule, the live yeast cells themselves and a fiber fraction from the cell wall. Jarrow Formulas deliberately puts them together in the same capsule. What many people do not know: mannan-oligosaccharides are not an exotic substance. They occur naturally in the cell wall of every yeast cell, so bread and beer also contain a small amount of these sugar chains. The difference is that here you get them in a concentrated, measured amount. That makes it easy to know exactly what you take per day.

Shelf-stable without refrigeration

Many people wonder if you need to store live cultures in the refrigerator. With this Saccharomyces boulardii, that is not necessary. Jarrow Formulas guarantees at least 5 billion live cells until the expiration date, as long as you store the bottle in a cool, dry place. By this, the manufacturer means a temperature up to about 25 degrees. Refrigeration is allowed, and even extends the shelf life a little. That makes the bottle easy to take with you, for example in your suitcase on vacation. The capsule is filled with yeast powder, MOS, and some tapioca starch as a filler. A small amount of ascorbic acid acts as an antioxidant to keep the contents stable.

In short: this is a straightforward yeast formula with a clear amount per capsule. The capsule is plant-based, so this Saccharomyces boulardii from Jarrow Formulas is vegan and free from gluten, soy, dairy, and the other known allergens. Those who prefer a larger supply will also find the same formula from Jarrow in a bottle of 180 capsules. The content per capsule is then exactly the same. Jarrow Formulas is an American brand from California that has been making supplements since 1977 and is known for formulas with live cultures.