SO's dad gave us (him) a juicer for Xmas one year. We don't juice unless we feel under the weather, and then we make shots by juicing lemon and ginger, add a dash of maple syrup, a few drops of oregano oil, and a sprinkle of cayenne. It probably doesn't do much, but it makes us think we are somehow taking a healing action.
We've also used it to juice citrus to make marinades - orange, lemon, lime, depending on marinade/what is being marinated.