A diet that has an adequate iron intake is essential for Erythropoiesis.
Your chest may hurt because you might have something going on your body.
You might have a itchy throat or you might be sick.
Self-esteem is one's confidence in how much they are worth or their abilities; self-respect.
Life is the seemingly endless cycle of the repetitious processes of the mind altering psychoactive dispositions of intricate and faulty human responses to stimuli.