What shampoo is best for colored hair?

For colored hair, you need a shampoo that's specifically formulated for it - regular products just wash the color out faster. Color shampoos have milder surfactants and often UV filters that protect the color pigments. Look for keywords on the bottle like "Color Safe" or "for colored hair," and make sure it's sulfate-free - that makes a big difference in how long the color lasts. If you color your hair regularly, a good product is worth it in the long run because your color just stays vibrant longer.