Brief
Tagatose (CAS No. 87-81-0) is a naturally occurring low-calorie monosaccharide that has gained attention as a premium functional sweetener in the food, beverage, and nutraceutical industries. With a sweetness level close to sucrose but significantly fewer calories, Tagatose offers excellent taste, low glycemic impact, and additional health benefits such as prebiotic activity, blood sugar control, and weight management support. Its unique combination of sweetness, stability, and physiological advantages makes it a promising ingredient for diabetic-friendly, low-sugar, and functional food formulations.
What is Tagatose?
Tagatose is a ketohexose monosaccharide structurally similar to fructose but metabolized differently in the human body. Its chemical formula is C₆H₁₂O₆, with a molecular weight of 180.16 g/mol, and it occurs naturally in small amounts in dairy products and certain fruits. Tagatose provides approximately 92% of the sweetness of sucrose while containing only 1.5 kcal per gram, making it an ideal low-calorie sugar alternative. Due to its slow and partial absorption in the small intestine, Tagatose has a minimal impact on blood glucose and insulin levels, and the unabsorbed portion ferments in the colon, exerting prebiotic effects that support a healthy gut microbiome. It also contributes to improved lipid metabolism and may play a role in reducing postprandial blood sugar levels. Because of these combined benefits, Tagatose is widely used in functional foods, beverages, diabetic formulations, confectionery, and dietary supplements that aim to reduce sugar content without compromising taste or stability.
What are the specifications?
▶ Tagatose powder
Chemical Name: D-Tagatose
CAS No.: 87-81-0
Molecular Formula: C6H12O6
Molecular Weight: 180.16 g/mol
Purity: ≥ 98.0%
Sweetness: ~92% of sucrose
Melting Point: 134–136°C
Appearance: White crystalline powder
Solubility: Freely soluble in water; slightly soluble in ethanol

What does Tagatose do?
Tagatose serves as a natural, low-calorie sweetener that closely mimics the taste and functionality of sucrose while offering additional metabolic and digestive benefits. It helps maintain stable blood glucose levels due to its minimal glycemic impact, making it particularly suitable for diabetic-friendly and weight-management products. As a prebiotic ingredient, Tagatose promotes the growth of beneficial gut bacteria, supporting digestive health and potentially improving overall metabolic function. It also plays a role in lipid regulation, with studies showing potential improvement in triglyceride levels. In food applications, Tagatose provides good browning, bulk, and texture, making it ideal for bakery products, confectionery, beverages, and health-oriented formulations. Its functional versatility and health-promoting properties position it as a superior sugar alternative for both food manufacturers and nutritional product developers.
Conclusion
Tagatose stands out as an advanced functional sweetener that not only provides near-sucrose sweetness with reduced calories but also promotes gut health, stable blood sugar, and metabolic balance. Its excellent sensory profile and versatile performance in various food systems make it a valuable ingredient for modern low-sugar, low-glycemic, and health-oriented product formulations. As the demand for clean-label and healthier sweetening solutions continues to rise, Tagatose is poised to become one of the most important sugar alternatives in the global food and nutraceutical industry.
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