GR
GR-7 Professional
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The GR7 Real Shades definitely does work.
The GR7 Real Shades definitely does work and reversed around 95% of grey to original brown color by 3.5 weeks. The temple area is stubbornly resistant, changing slower. I stopped leaving it in 24 hours a day after the 5th day because I couldn't stand the smell and texture while sleeping. So my results are with 12 hours a day and washing hair each night. You have to be patient and keep with it.