Lemon Salt Lemon salt with a touch of lemon flavor. It's ideal to have with snacks and to add to dishes that need a lemony salt flavor. Citric acid face mask for skin lightening wrinkles: for an anti aging face mask using citric acid, take citric acid in a mortar and pestle and crush the citric acid crystals to a fine powder. Add enough yogurt, little bit of honey and 1 vitamin e capsule to form a spreadable mask and apply on the skin.