Well, itseems a bit vague if u r asking beause u have consistently and often been victim of hunger voluntarly so ur mood becomes irritable or if you want to know if intentional strarvation could potentially lead you to calmness. But in the first case u ur self can find out by eating or not for the effects. But if the case is thesecond one avoiding food for considerable time is ,for some people, a powerful medication and has unbelievable therapeutic value. It reduces gut microbiota instability as the usual added sugars and other chenicals are being eliminated. You will feel calm and concentrated because ur brain devoid of immediate energy like glucose sources starts to use ketones, which are very good. Your body starts autophagy state so that it begins to cleanse waste material .so yeah dont feel discourage and entirely it is normal. infact it is known as dry fasting