After 1 use of this I could totally see and feel the difference! I have bleached blonde hair and extensions and my hair is overall quite dry. This has has completely changed the look and feel of my hair. It feels softer and looks shinier and holds its style a lot better meaning I don't have to style it as much. I wish I discovered this ages ago and when I first got my hair extensions as I think it would have helped prolong them. Yes, the bottle is small for the price. But I think you should get about 8 treatments out of it. So when you divide the cost per treatment, it's not the worst - especially given how much you pay in a salon for treatments that usually don't have much of an effect. If you have dry/damaged/coloured hair - you need this in your life!!!!

I was so excited to use this and it didn’t disappoint. Firstly it smells amazing! It goes on well. From the first use it really brought out my hair colour, it felt brighter and fuller. My hair dried nicely and styled well. I think the only downside is that the bottle is so small. I wish it was a larger size for the money.

My almost-white hair was totally fried from at-home bleaching and weekly bleach baths to keep it bright, I left the Olaplex on overnight and washed /conditioned it as usual the next morning and it felt silky soft again! Now using it once a week.

Love this product, it helps my hair keep in a good condition.

My hair is in okay condition overall but has a lot of highlighting. I left it on overnight - no massive improvement but my hair did straighten nicely after and stayed smooth despite the humidity. I have long thick hair and a little does go a long way. I use it once a week and my hair does seem sleeker after blow drying.