The “brain isn’t done until 25” factoid is based on a funding cutoff
You’ve seen the claim on TikTok, in parenting forums, and in roughly a million Instagram infographics: “Your brain isn’t fully developed until you’re 25.” It’s the go-to explanation for everything from bad relationships to impulsive tattoos. The number 25, though, has almost nothing to do with neuroscience. It’s an artifact…
