Gray hair follicles produce little oil and next to no melanin, says Richard Korb, a scientist in research and development at Unilever (maker of Dove Hair Care). A glossing treatment can help. A good at-home version costs less than salon, and results last about a week. Try John Frieda Luminous Color Glaze, which comes in five tinted shades as well as one clear formula ($10).
Tip: To maximize post-glaze shine, deep condition weekly to smooth your hair’s cuticle (its outer layer) and create a flat, light-reflecting surface — Oscar Blandi Marine Mud Treatment ($26) instantly hydrates parched grays and will help a glossing treatment endure.Buy John Frieda Luminous Color Glaze Buy Oscar Blandi Marine Mud Treatment