Optibac S. Boulardii Capsules provide five billion live cultures of the probiotic yeast Saccharomyces boulardii per capsule. This unique strain has been widely researched for over fifty years and is known for its role in supporting digestive health and maintaining a balanced gut environment. Suitable for vegans and free from dairy, gluten and soy, the capsules are also shelf stable, making them convenient for travel and daily use.