Do hard-to-pronounce chemicals stop you from coloring your hair? Well, you can continue to hold out, Granola, because you could be dying your hair with gold someday. Dr. Philippe Walter at Université Pierre et Marie Curie-CNRS and his colleagues were interested in trying out gold nanotechnology to dye hair. They carried out the test on a couple of white hairs by soaking them in gold particles. After a day, the hairs turned yellow then a little over two weeks later, the hairs were permanently a dark brown — even after several washes. When you consider it would take about $30 of gold to dye an average head of hair, that’s pretty affordable compared to a $100+ trip to the hair salon. Plus you get the added bonus of bragging about your golden locks to anyone who will listen.