Unnamed guest on Russell Brand claims 83% of Gen Z diagnosed

What was said

"When you look at Gen Z data right now, 83% of Gen Z has either been given a medical health diagnosis or they would say, I believe I have one. It just has not been diagnosed yet. 83%."

An unnamed guest on Russell Brand’s channel claims unspecified “Gen Z data” show 83% of Gen Z have a mental-health diagnosis or suspect an undiagnosed condition. The guest offers no source for the figure and links it to a wider argument about loss of meaning leading to despair.