Is riboflavin vegan?

Riboflavin, also known as vitamin B2, is a water-soluble micronutrient and an authorized yellow-orange food colorant designated as E101. In the food industry, it is widely utilized for nutritional fortification and visual coloring. It commonly appears on ingredient labels for enriched flours, fortified breakfast cereals, nutritional yeast, energy drinks, plant-based milk alternatives, and various processed snacks or condiments.

Modern commercial riboflavin is primarily produced through microbial fermentation using specialized strains of fungi or bacteria, such as Ashbya gossypii and Bacillus subtilis, grown on sugar-rich plant substrates. Alternatively, it can be manufactured through direct chemical synthesis using non-animal starting materials. While riboflavin naturally occurs in animal products like milk, eggs, and organ meats, extracting industrial quantities from animal sources is economically inefficient and technically impractical.

Because commercial manufacturers rely exclusively on microbial biosynthesis or chemical synthesis, the riboflavin found in packaged foods is vegan. No animal tissues, dairy products, or animal-derived processing aids are used in standard industrial production.