Virgin—i.e., never dyed—hair is almost always the shiniest hair. “Permanently colored hair undergoes a chemical change that forces the cuticle layer open to deposit the new color, causing the hair to become more porous and leaving the surface not as smooth,” says Erica Douglas, a cosmetic chemist and founder of sisterscientist.com. Fortunately for our fellow dye-hards, there is a new crop of at-home products that work like smoothing, shine-boosting glosses—but without the mixing, combing, 30-minute wait times, and hefty price tags ($15 and up for one application). L’Oréal Paris Le Color Gloss, Tresemmé Gloss collection, and Garnier Nutrisse Color Reviver go on just like conditioner with about the same consistency, so they’re easy to spread: In the shower, rake the product through clean, damp hair, rinse after 3 to 15…
