If you are looking for that little extra from your shampoo then this recipe for an enhancer may well do the trick. The egg conditions normal or dry hair, while lemon juice makes it shine.
To make 1 application
1 egg
1 teaspoon lemon juice or cider vinegar
3 tablespoons mild, unscented shampoo
Mix the ingredients in a small bowl. Shampoo the mixture into your hair and then rinse well with warm water. Make fresh each time of use.