I just bought this oil as a final hope to heal my long damaged hair (it was mechanically damaged due to excessive hair combing causing hair break and become coiled in shape, harsh shampoo, and environmental damage almost causing my pitch black hair to 'lose pigment?'), of course living with harsh frizzy hair stresses my mentality, i just couldnt treat my hair right and gave up because i spent so much money on "medium-high end" priced hair oils/mask that do little to nothing, at that point my hair begins to break off like a dry straw, as a last action to save my hair i researched Olaplex to find out the patented ingredient Bis-aminoproply diglycol dimaleate, without hesitation i purchased only this oil at a verified Olaplex online store in here, as the package arrived i quickly tried on the oil as fast as possible, i actually did "10" drips of oil on each half-sections on dry frizzy unmanageable hair, after a few second i witness a dramatic change, i broke into tears of happiness to witness my hair became smooth silky and all the wonderful things, my hair no longer felt brittle when touched, i felt a drastic strong resillience on my hair texture! my hair is now like back when i was a child when i had robust healthy hair, thats how it felt like! Olaplex No.7 brought me back to my childhood days and by all means, i want to thank Olaplex so much for helping us restore our hair back to our original healthy state!