How do you know which Olaplex number to use?

Is your hair dull, brittle, and lifeless, and do you long for a healthy and shiny hairstyle? Then tackle this problem permanently now with the numbered Olaplex routine that repairs damaged hair from the inside out. The system numbered from 0 to 10 may seem complicated, so here is an explanation of the Olaplex products, their number functions, and the best Olaplex products for your hair.