And we form a mixture of two types of isomers. And these isomers are known as animals. So animals are isomers that differ in this first area, genic carbon, in the arrangement of atoms on this first stereogenic carbon. So we have the alpha and the beta animal. The alpha animal means that the hydroxyl group on the first carbon points in the opposite direction with respect to this group here, which is shown here, while the beta anamar, these two groups, point in the same exact direction. Now, inside our body, about two thirds exist in this beta form, one third exists in this alpha form.