I expected to use this product on clean hair after my wash as a sort of serum. But it leaves my hair greasy this way or my hair gets oily quicker. So now I use it overnight before my hair wash day, this way it works well. 

Prone to leakage upon transit. Cult beauty please improve your shipping. Wet box upon arrival to me. Box used was too light and feeex couldnt care less.

I adore this range as every product delivers what it says for my very long fine and fragile hair.  The only other hair product I really rely on and have done for over eight years is Olaplex 3.  When this became available just had to buy it.  I did not read anywhere until I received this serum it is for overnight use.  I have had a sore scalp for some time, applied this and within minutes it felt soothed.  I think the soreness which is minor but is caused by my three weekly root touch ups.The  applicator nozzle is easy to use and only needed a small amount probably about about a 10p size.  It doesn’t feel greasy at all but notably my hair after a gentle massage in did at the roots stay feeling damp.  Definitely not a good look if I had to go out!The next morning it was literally a revelation, all had absorbed and my scalp felt soothed but the shine on my hair was superb, lovely product.   With of the Gisou range,  I am hooked and feel if I don’t use them the results are noticeably poorer, hair tangles,  feels drier and lacks any shine.  More expensive than most ranges yes, but I find I can get away with using less of each product, which really helps.