Helia-D Regenero, 100 ml, Hair Serums for Women, The Helia-D Regenero leave-in treatment gives your hair everything it needs after washing. Characteristics: seals and strengthens split ends restores dry, brittle, and damaged hair smooths the surface of your hair leaves hair silky soft to the touch How to use: Put a small amount of serum into your palms and then work it into your hair.