Glowelle Hair Straightening Serum is a silicone-free and paraben-free hair serum that is made especially for chemically treated and damaged hair and is best for all-time nourishment. It gives a smoother and lighter touch It also repairs damaged hair and increases your hair's manageability, leaving it shiny and glossy. D-Panthenol in it is good for rough-textured hair because it can smooth out the imperfections in the hair shaft and acts as an anti-inflammatory agent.