5 Reasons Why You Get Angry When Hungry: The Science Behind ‘Hangry’

3. Genetics Matter: The Role of Neuropeptide Y

Interestingly, genetics also play a significant role in determining how we respond to hunger. Some individuals possess higher levels of a neuropeptide called Neuropeptide Y (NPY), which is released in the brain during states of hunger. Research has shown that NPY is intricately linked to aggression, potentially amplifying emotional responses to stressful situations. If you have a genetic predisposition to higher NPY levels, you are more likely to experience intense feelings of anger or irritability when you’re hungry. This biological basis can explain why some people seem to become hangry far more easily than others.