It is so much better to listen to what people say and do. It means that the person thinks that it is easy to either predict or see by your facial or body expressions what you are thinking or what you will do next. Think of poker players and how they hide their reactions to their cards.
This doesn't mean you can take vitamins or apply topical vitamin C and then bake safely in the sun, but you can help keep your skin healthy and supple by making sure you get enough of this antioxidant vitamin [source: Bouchez].
Facts on Vitamin C. Vitamin C is a water-soluble vitamin in most fruits and vegetables. As a water-soluble vitamin, C is not stored in the body and any excess is voided in the urine. That means you need vitamin C daily. Your body uses vitamin C to repair damaged tissues and initiate the growth of skin, tendons, bones, teeth and blood vessels.