Not Olaplex
I can't comment on the effects of this product, but I'm giving it two stars because Schwarzkopf lies about it's abilities. It claims that their Fibreplex does the same as Olaplex, which is repairing sulfide bonds in the hair.  But after questioning I found out that their active ingredient is different, it's magnesium citrate. Nowhere can I find support for the benefits of topical application of magnesium citrate on hair, let alone that it could repair sulfide bonds.
Rating: 2 stars