1. Will it work with one wash?
2. How long do you need to leave the shampoo on your hair before rinsing?
3. What are the ingredients?
4. Does this have silicone in it?
5. Is this product cruelty-free?
6. What does the product smell like?
7. What hair colors does this work best on?
8. Is this safe for color-treated hair?
9. Will it work on natural blondes, white, and greys?
10. Is GBG recommended for everyday use?
11. Is this safe to use with hair extensions?
12. How big is the bottle?
13. Will this leave hair looking shiny?
14. Will this dye a white shower purple?
15. Can it work on hair that was bleached 3 months ago or does it have to be newly bleached hair to work?
16. How well does this work on bayalage with a lot of dimension? I want to prevent brassy, but I don’t want to end up losing my dimensional bayalage look.
17. Does GBG have a guarantee?