DOES A COLD RINSE ADD SHINE?
In a word: No. The rationale behind this one has been that icy water closes the cuticle of your hair so it’s flat (and more light-reflective). Chemists found that cold water had zero shine-enhancing effects on hair and that warm water actually made it look glossier. What’s more,“cold water may not rinse residue off strands as well as warm water can,” says cosmetic chemist Joel Coret. Next time, skip it!