Why is it when I use certain shampoos, my gray hair on top stands out more than when I use other shampoos? Is

it true that there is something in the shampoo that makes gray hair stand out more?Why is it when I use certain shampoos, my gray hair on top stands out more than when I use other shampoos? Is
1] extra volume formula - gray hair is coarser, so 'fluffs' more


2] shiny formula - color difference shows more


3] color protection formula - enhances ALL the colors, even grayWhy is it when I use certain shampoos, my gray hair on top stands out more than when I use other shampoos? Is
if the shampoo is made to make your hair shinier, it will make your grey hair look a little silvery, making those strands more noticable