Tag: Brain maturation

While legal adulthood is often reached at 18, scientific research indicates that the human brain does not reach full maturity until approximately age 25. The question, 'Are 20 year olds fully grown?', therefore has a more complex answer that extends beyond simple physical metrics, encompassing a period of continued maturation in both body and mind.

According to research from the National Institute of Mental Health, the brain's prefrontal cortex is one of the last regions to fully mature, with development extending into the mid-to-late 20s. This highlights why simply defining at what age is the human body completely developed is not straightforward, as different systems follow different timelines.