this is like a toner which most teens have oily skin so its perfect for them. FLORIDA GRAPEFRUIT FRESHNER Peel from 1 medium size grapefruit 1 vitamin C tablet 1  cup boiling water Place the grapefruit peel in a small ceramic or glass bowl. Dissolve the vitamin C tablet in the boiling water and pour the solution over the peels. Allow the mixture to cool completely.  When cool, strain the liquid into  a clean container.