Made from petroleum, red dye 40 is a synthetic food dye. Some studies suggest a link between red dye 40 and ADHD behavior; the dye might trigger or exacerbate behavioral changes in sensitive children.

They’re both great options for those moments when new gray growth just barely starts to appear or you need a quick fix between dye jobs. They work much like under-eye concealers—but for your ...

In a small corner of rural Taiwan, set amongst other dye houses and small factories, the start-up Alchemie Technology is in the final phase of rolling out a project it claims will upend the global ...