Jaden Smith says he took magic mushrooms as a young adult. Brain experts who study psychedelics warn that wasn't a good idea.

• Jaden Smith said his mother, Jada Pinkett Smith, introduced him to magic mushrooms.
• Jaden Smith was 24 when he shared that, a time when experts said brains may still be developing.
• Neuroscientists explain how developing brains may be vulnerable to psilocybin's negative effects.

An estimated 11% of adults in the US said in a 2021 survey they had taken psilocybin or mushrooms. But not everyone makes "magic mushrooms" a family affair.