Washing hair with Coca-Cola for shine.
This is a long-time favorite technique among not just Latino families, but celebrities like Suki Waterhouse. Hairstylist Nunzio Saviano gives this traditional trick the thumbs up: "The acidity closes the hair cuticle, which makes it look healthy and shiny. But be careful: the sugar can leave your hair sticky, so you might need to rinse it out quickly. Apple cider vinegar is an alternative that might not be as messy!"