I can keep going on about how good it is, but I think it would be almost a crime not to put you on to the Biolage Color Last shampoo ($42; $28). There's a reason why it has more than 2,500 5-star ...

We tracked down one affordable shampoo shoppers with gray hair are totally obsessed with — and it’s just $6 on Amazon. BIOLAGE Color Last Shampoo ($6) is perfect for giving your gray hair some ...