L-Erythrulose is also called Erythrulose or DHB which is a natural ketose that appears as a yellow, highly viscous liquid and needs to be refrigerated. L-Erythrulose is generally used in combination with 1,3-Dihydroxyacetone(DHA) to deepen the color of DHA and make its distribution more even. L-Erythrulose is a self-tanning agent for smooth tanning of the skin.