I bought this after being enthused by all of the reviews. It did nothing for my dry, straight hair. I've gone back to using raw coconut oil once a week to treat my damaged hair... which is a quarter of the price and is so much more effective!

My hair has been battered with bleach and processing and this product has kept it looking shiny and split end free. I use this as a home treatment once a week overnight on damp washed hair to supplement the 1 & 2 that I have applied at a salon - BUT I have also used this on it's own and had good results from it as a stand alone product. Follow the instructions and I doubt you will be disappointed. Shiny smooth hair without feeling lank.

I’ve tried other hair serums, oils, etc - you name it - but this really does what it says on the bottle. I have bleached highlights and my hair feels dry on the ends despite using the Olaplex 3 at home treatment. This serum, which should be used sparingly, gives my hair a softness and shine together with a bit of body. I like it... A lot!

So disappointed with this! It was so expensive for such a small amount, and had a curious effect on my hair. I have fine, thin dyed blonde hair and after I used this, my hair did feel softer but also so dried out and less thick than before? I’m so confused about the amazing reviews, as it was a complete waste of money for me.

Saved my long, dry hair from the intense damage it received on holiday. Just one treatment got my hair (and extensions) back to normal and more. Soft, manageable and shiny. So glad I found this product!