ActiBiso™ Erythrulose (Erythrulose) is a natural tanning agent. It undergoes a Maillard reaction, interacting with the amino groups of protein peptides on the skin's surface to create a brown polymer that adheres directly to the skin (the stratum corneum). In comparison to 1,3-Dihydroxyacetone, Erythrulose yields a more natural and authentic brown color, offering a longer-lasting effect and a more stable formula.