Your skin and hair have a "bad" habit of leaving traces of emotions that you experience. Observe how your skin reacts when you feel frustrated, as it reacts your hair and nails. One way to neutralize the influence of bad temper on the appearance - eat the right foods.
For healthy skin: nuts, cereals, oily fish - their fats are actively involved in the synthesis of collagen.
For strong nails: dairy products. Nails needed calcium and silicon, which are also in sardines, eggs and oats. Speed up the metabolism by a garlic and ginger.
For beautiful hair: more foods containing iron - red meat and vegetables, flax and almonds.