GR-7 Professional
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I originally have dark brown hair
I originally have dark brown hair, which is 60-70% already grey, and I think I have a lot more hair than average. The bottle is 125ml, so when I got it, I was a little bit disappointed because it seemed to me that one bottle would be enough for 1 week (in my case). I used it twice a day, the results started to show relatively slowly, but after 4 weeks and using the fourth bottle I am quite satisfied with it. I think the result also depends on the type of your skin, I almost completely regained my dark brown colour on the sides, but there are still greyish, blondish, brownish shades on top of my head. Surely everyone gets the result differently, so I say that whoever decides to start using it should be persistent and do it all the way through.