E105, also known as Riboflavin-5'-phosphate sodium, is a food additive primarily used as a colorant. It is derived from riboflavin, a vitamin that plays a crucial role in energy production and cellular function. E105 is often found in various food products, including beverages, dairy items, and baked goods, to enhance their visual appeal. This additive is recognized for its bright yellow hue and is commonly used in the food industry to attract consumers. While E105 is generally considered safe for consumption, it is essential for individuals with specific dietary restrictions or allergies to check product labels for its presence.