We've all heard those weird DIY tips about getting your hair shiny, skin clear and other natural so-called beauty boosters. They're passed down from friends or moms and perhaps tried on a cold winter day with a well-stocked pantry full of potentially beautifying products. But do these concoctions - beer, eggs and mayo for hair or hemorrhoid cream, toothpaste, food and other substances that have no business being on your face to zap zits and get skin in shape - actually work? In some cases, yes - but in some cases, they can be ineffective at best and harmful at worst. Let's start with the edibles. First, slathering full-fat mayonnaise on your hair to deep condition it works...if you can stand the smell. All those fats and oils do a great job of moisturizing dry tresses, but you can find other deep conditioners that work just as well and smell a whole lot better. If you just can't stay out of the pantry for a dry-hair remedy, then go for olive oil. It smells a bit better and does just as good a job as a deep conditioner.