I want to get a keratin treatment but I'm concerned about formaldehyde. According to the Oregon OSHA
, the following have the lowest levels. Has anyone had experience with these? I'm not sure which one to try. Also, if I have very thick hair will I need extra product?
JKS Smoothing Treatment
Pravana Keratin Fusion Texture Control
Bio Ionic KeraSmooth
For some reason I also had Brocato Curl Interrupted in my notes, but I couldn't find a study to back it up.