Hacky iron callaway

Are Progressive Hair Colors (Grecian, etc.) safe? - grecian formula after efects

For example, I'm going to my natural blonde to dark brown. But since I am a man, I can so that people gradually Freak Out: P. In any case, it is this hair Progessive like Greek name, sure? It would also be capable of normal hair color (natural instincts) after reaching its final stage with the progressive use hair color?