Keratin Restructuring Complex This safe keratin amino acid based smoothing treatment penetrates through the hair cuticle to restructure and rebuild – leaving hair manageable, flexible, glossy and silky smooth. A safe and scientifically advanced alternative to Brazilian Keratin Treatments that contain dangerous formaldehyde-emitting ingredients, independent tests confirm KERAPURE™ emits NO toxic formaldehyde vapors. Sold to Professionals Only.