A Complete Guide to the Best Olaplex Products — Including Those on Sale For Prime Day

Olaplex No. 0 Intensive Bond Building Treatment ($24, originally $30)

Depending on how dry or damaged your hair is, you can use this Olaplex No. 0 Intensive Bond Building Treatment to intensify the effects of the brand's No. 3 formula. The product helps prep the hair to absorb ingredients, which results in longer-lasting hydration and shine. It's especially great for those with curly hair who limit their washes to only once or twice per week, as it's recommended that users work this formula into their hair-care routine two times each week.