Best grocery store color protecting shampoo?

Hey ladies,

I’m getting my hair done for the first time in YEARS and it’s going to be quite an adventure. I’m going from blonde to red! I want to make sure the color stays as long as possible, but I can’t afford $20-a-bottle professional color protecting shampoo at the moment.

Do any of you have a favorite grocery/drugstore-bought color protecting shampoo? If you do, please tell me in a comment below! Also, if you have a favorite prestige brand product, feel free to tell me what that is as well, so I can read about it and potentially pick some up when I have a little more money. TIA!! 😘