Former Surgeon General Vivek Murthy again called on parents in an interview Sunday on NBC's "Meet the Press" to regulate their children's use of social media to protect their mental health — particularly at younger ages.

"Delaying the use of social media for your kid as long as possible is important," Murthy told host Kristen Welker. "The bottom line is these devices, these platforms, in particular, social media platforms, are having an effect on our children."

He cited 16 years........

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