Overview
Rebaudioside B (Reb B) is a steviol glycoside extracted from the leaves of Stevia rebaudiana, a plant native to South America. It belongs to a group of natural sweeteners that are increasingly popular as sugar substitutes due to their zero-calorie content and high sweetness potency. Unlike artificial sweeteners, Reb B is derived from a natural source, aligning with consumer demand for clean-label ingredients. Reb B is one of several glycosides found in stevia, each with varying sweetness levels and aftertastes. While Rebaudioside A (Reb A) is more commonly used, Reb B offers distinct stability advantages in certain applications. Its adoption is growing in the food and beverage industry, particularly in products requiring heat processing or long shelf life.
Physical and Chemical Properties
Rebaudioside B is a white to off-white crystalline powder with a molecular weight of 804.88 g/mol. It is highly soluble in water and ethanol, facilitating its incorporation into liquid and solid formulations. The compound exhibits remarkable stability under high temperatures (up to 200°C) and acidic conditions (pH 2-10), making it suitable for baked goods and carbonated beverages. Its sweetness intensity is approximately 150-300 times that of sucrose, though slightly less sweet than Reb A. Reb B has a clean sweetness profile with minimal bitter or licorice-like aftertaste compared to other steviol glycosides. These properties are attributed to its unique molecular structure, which includes glucose units attached to the steviol backbone.
Main Applications
Rebaudioside B is primarily used as a natural sweetener in the food and beverage industry. It is found in sugar-free or reduced-sugar products such as soft drinks, dairy products, confectionery, and baked goods. Its heat stability makes it ideal for pasteurized or sterilized products, unlike some artificial sweeteners that degrade under high temperatures. In the pharmaceutical industry, Reb B serves as an excipient in chewable tablets and syrups to mask bitter tastes. It is also used in dietary supplements targeting weight management or diabetic consumers. Recent innovations include blends with other sweeteners (e.g., erythritol) to improve taste profiles and reduce costs in final formulations.
Safety and Storage
Rebaudioside B is classified as Generally Recognized as Safe (GRAS) by the U.S. FDA and approved by regulatory bodies worldwide, including EFSA and JECFA. Clinical studies indicate no adverse effects at typical consumption levels, though excessive intake may cause bloating or mild laxative effects due to its glycoside structure. Proper storage is critical to maintain quality. The powder should be kept in airtight containers at room temperature (15-25°C), protected from humidity and direct sunlight. Bulk procurement requires attention to moisture content (<5%) and microbial limits to prevent clumping or spoilage during long-term storage.
B2B Procurement Guide
When sourcing Rebaudioside B, prioritize suppliers with certifications such as ISO 9001, FSSC 22000, or GMP to ensure quality compliance. Key specifications include purity (≥95%), heavy metal limits (<3 ppm), and residual solvent levels. Request Certificates of Analysis (CoA) for each batch and validate third-party lab test results. Pricing varies based on order volume, with discounts available for contracts exceeding 100 kg. Consider regional suppliers (e.g., China for cost efficiency, Europe for regulatory compliance) and inquire about custom blending services. Sample testing is recommended to assess compatibility with your product matrix before large-scale procurement.
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