Like Olaplex, it's a rebonding treatment to help repair heat or chemical damage.
Promising review: "I love this stuff! I was initially looking for Olaplex and came across this so I thought I would give it a try. I have been trying to grow out my hair but the ends become dry and easily damaged, so every time it grows I just need to cut it again. I was about to cut it when I got this in the mail and tried it. It was amazing! Gave my hair that fresh cut look and feel, added tons of shine back in and made it feel so healthy. This is a game changer for me!" —mmsmco
Promising review: "This stuff is amazing ! I believe the last bleaching on my 4C hair I fried it . But after using this tonight, my hair feels so smooth and my curl pattern is back ! **5 stars**!" —j. kindred
Get it from Amazon for $23.99.