Your brain is not actually finished developing until your thirties
While eighteen is legally considered adulthood, the human brain continues to undergo significant structural changes and refinement well into a person's late twenties or early thirties.
The prefrontal cortex, which governs decision making and impulse control, is the last brain region to reach full maturity. Research suggests this process of synaptic pruning and myelination continues long after adolescence, often peaking around age thirty. This delay helps explain why young adults may still struggle with long term planning or emotional regulation compared to older peers.
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