Apple cider vinegar might not taste good (like, at all), but it sure is great for your hair. Because of how acidic it is, washing with it can help bring life back to damaged strands, make it super-shiny, and keep your color looking top-notch. It’s also great for your scalp, balancing the pH and clearing any buildup. Yep, basically it’s the beauty BFF you didn’t know you needed… and everyone’s starting to jump on the bandwagon.The best-selling beauty product on Amazon this week is none other