Touch up your roots and only your roots. "I've seen so many clients who come in because they touched up their roots but accidentally dyed their ends, too," says Ionato. "The ends of your hair are more porous, so they suck up color very quickly." So quickly, in fact, that the runoff from rinsing out your roots can stain them. To avoid this, apply conditioner to your ends right before you rinse out the color at the top of your head. Or you could try this quick tip: Mix about one teaspoon of cornstarch into the dye to prevent it from dripping down through the rest of your hair.
"These six ingredients are a mix of hair color 'actives,' preservatives and contaminates, and we were able to redesign our hair color from the ground up without the need or presence of any of them," Smith explains. "We've been able to remove them from our products in order to minimize the chemical profile of our formulas while maintaining salon_quality gorgeous results." Go as natural as possible. If you still prefer natural ingredients regardless of unproven safety benefits, you may want to look to a trusted brand like Aveda, which promises a mostly natural hair_color formula.