سيروم اصلاح الشعر التالف Goldwell Dualsenses Rich Repair Intensive Restoring Serum

This product worked really well for my hair (thin, bleached) - I can feel its nourishing/restorative properties and it gives a beautiful shine, just like all the other products in this line. I mainly use it when I don't have time for hair masks, as a leave-in treatment, and I top it off with oil. One bottle lasts me around 4 uses on my shoulder-length hair. I read on the internet that one bottle is meant for one use, but that didn't happen for me, even when my hair was slightly below waist length.