Science Reveals: Adolescence Lasts Longer Than You Think! Find Out Until What Age

Turning 18 is a milestone eagerly anticipated by teenagers and their parents alike. For young people, it symbolizes the transition into adulthood, opening up new freedoms like driving, voting, drinking alcohol, hitting the nightclubs or casinos, and generally being able to make decisions without parental consent. Parents, on the other hand, breathe a sigh of relief, hoping to see the end of the tumultuous teenage years. Yet, even though the law acknowledges 18-year-olds as adults, our brains take a bit longer to catch up.

Indeed, a groundbreaking study conducted by neuroscientists at the University of Cambridge has shown that the brain undergoes five distinct developmental stages throughout life, each occurring at specific ages. The study, which looked at the neural connections of nearly 4,000 individuals ranging from newborns to nonagenarians, identified “four critical tipping points where our brain reconfigures itself”: one of these pivotal transitions is the shift from adolescence to adulthood, which happens much later than previously thought.

Contrary to popular belief, we are not fully mature adults during our twenties. This transition typically takes place at the age of… 32! “While puberty marks a clear beginning, the end of adolescence is much harder to pinpoint scientifically. Based on the neural architecture alone, we found that the structural changes characteristic of adolescence conclude around the early thirties”, explains Dr. Alexa Mousley, lead author of the study. During adolescence, the brain’s efficiency peaks: neural connections are quick and continually increasing until they stabilize in the early thirties. This is why neuroscientists have determined this age as the end of the adolescent period. “At 32, the longest developmental period, that of adulthood, begins. The brain architecture stabilizes compared to earlier phases, with no major disruptions for about thirty years”, the researcher adds.

Indeed, the study outlines five life stages: childhood from 0 to 9 years, adolescence from 9 to 32 years, adulthood from 32 to 66 years, early aging from 66 to 83 years, and late aging starting at 83 years. While it was commonly thought that adolescence begins around 12-13 years, the study, published in the scientific journal Nature Communications, shows that it starts as early as age 9. This marks the first significant turning point in life, where “the brain undergoes a major evolution in cognitive abilities, along with an increased risk of mental disorders”.

This redefinition of life’s major milestones challenges many educational, social, and medical benchmarks and calls for a reevaluation of how we support young people, particularly between the ages of 20 and 30. This period is often mistakenly seen as a time of complete independence, whereas biologically, it remains a period of intense developmental activity. However, parents can rest assured that this does not mean your child’s teenage crisis will last until they are 32!