As it says on the bottle, the John Frieda Luminous Glaze Clear Shine Gloss (£13) is for all shades of hair. Since it's a colour-less gloss, it doesn't contain ammonia or peroxide, it won't deposit any dye or lighten your hair at all. Instead, it focuses on adding a shine so intense it dazzles.
This treatment is also a little different from many gloss formulas in that it can be used each time you wash your hair — many gloss treatments are used on a weekly or every-so-often basis.