Overview
Saccharomyces cerevisiae var. boulardii, also known as brewer's yeast or baker's yeast, is a versatile strain of yeast widely utilized in the food and beverage industry. It is renowned for its high fermentation efficiency, making it a key ingredient in brewing, baking, and probiotic supplements. This yeast strain is also valued for its thermostability and probiotic properties, which contribute to gut health and digestion. The strain was first isolated by French scientist Henri Boulard in the 1920s from lychee and mangosteen fruit. Since then, it has been extensively studied and commercialized for its beneficial effects in both human and animal nutrition. Its ability to thrive in a variety of environmental conditions makes it a robust choice for industrial applications.
Physical and Chemical Properties
Saccharomyces cerevisiae var. boulardii typically appears as a pale yellow to light brown powder. It has a density of approximately 0.5-0.6 g/cm³ and is soluble in water, though only slightly soluble in ethanol. The yeast cells are spherical to oval in shape, with a diameter ranging from 5 to 10 micrometers. One of the standout properties of this yeast is its thermostability, allowing it to remain active at temperatures up to 50°C (122°F). This makes it particularly useful in processes like baking and brewing, where elevated temperatures are common. Additionally, it exhibits high resistance to gastric acids, enabling it to survive passage through the stomach and colonize the intestines effectively.
Main Applications
The primary application of Saccharomyces cerevisiae var. boulardii is in the brewing and baking industries, where it serves as a leavening agent. In brewing, it converts sugars into alcohol and carbon dioxide, while in baking, it produces carbon dioxide to help dough rise. Beyond these traditional uses, it is also employed in the production of probiotic supplements, owing to its ability to support gut health and boost immunity. Another significant application is in animal feed, where it acts as a natural growth promoter and digestive aid. Research has shown that incorporating this yeast into livestock diets can improve feed efficiency, enhance nutrient absorption, and reduce the incidence of digestive disorders. Its versatility and safety profile make it a valuable component in various industrial and nutritional products.
Safety and Storage
Saccharomyces cerevisiae var. boulardii is generally recognized as safe (GRAS) by regulatory authorities, including the FDA and EFSA. However, individuals with yeast allergies or compromised immune systems should exercise caution, as it may trigger allergic reactions or infections in rare cases. Proper handling and storage are essential to maintain its viability and prevent contamination. For optimal storage, the yeast should be kept in a cool, dry place, away from direct sunlight and moisture. Sealed containers with desiccants are recommended to prolong shelf life. Bulk procurement should include verification of the Certificate of Analysis (COA) to ensure product quality and activity levels. Proper storage conditions can extend the yeast's viability for up to two years.
B2B Procurement Guide
When procuring Saccharomyces cerevisiae var. boulardii for industrial use, it is crucial to source from reputable suppliers who provide detailed product specifications and a Certificate of Analysis (COA). The COA should include information on purity, viable cell count, and moisture content. Bulk buyers should also consider the yeast's activity level, as this directly impacts its performance in applications like brewing and baking. Price negotiations should account for factors such as order volume, packaging, and delivery terms. For reference, prices typically range from $10 to $50 per kilogram, depending on purity and quantity. Long-term contracts with suppliers can often secure better rates and ensure consistent quality. Additionally, buyers should verify the supplier's adherence to Good Manufacturing Practices (GMP) to guarantee product safety and efficacy.