Eating disorder portion of the vulnerability to develop eating disorders can be inherited, and there is evidence to show that there is a genetic locus that shows susceptibility for developing anorexia nervosa. About 60% of eating disorder cases are attributable to biological and genetic components. Other cases are due to external reasons or developmental problems. There are also other neurobiological factors at play tied to emotional reactivity and impulsivity that could lead to binging and purging behaviors. Epigenetics: Epigenetic mechanisms are means by which environmental effects alter gene expression via methods such as DNA methylation; these are independent of and do not
Emotional eating Those who experience this biologically instigated increase in appetite during times of stress are therefore primed to rely on emotional eating as a coping mechanism. Emotional eating differs from actual hunger in a number of ways. Emotional hunger tends to hit quickly and suddenly and feels urgent, yet physical hunger is usually not as urgent or sudden unless it has been a while since a person ate. Someone who is physically hungry will often eat anything, while someone who is emotionally hungry will want something specific, such as fries or a pizza; emotional hunger is usually associated with cravings for