The FDA regulates cosmetics via the Federal Food, Drug, and Cosmetic Act and the Fair Packaging and Labeling Act, neither of which define the term "organic." In other words, if you see hair dye that isn't henna and it claims to be organic or natural, it's "most likely still employing synthetic ingredients for it to work," Dr. Aral says. The good news: Hair dye doesn't have to be organic or natural in order to be safe, and there are other ways to be both health_ and eco_conscious when it comes to coloring your hair.
Highlight with a toothbrush. Several testers shared a smart trick for subtle results : Use a dye kit two shades lighter than your color and paint on highlights with a clean toothbrush or mascara wand. Place them sparingly where the sun would hit around the hairline and stemming from your part, Hill suggests. Start from the top : Since roots need the most color (and processing time), apply dye there first, then comb through the rest of hair to distribute it. Work in four to six sections, like pros do in the salon, to ensure full coverage.