Dr. Daniel Amen

It can go with low motivation.

It can go with depression over time.

It can go with more anxiety because your brain can't settle it down.

And in vulnerable people, it can go with an increased risk of psychosis.

Well, it's absolutely real.

And...

People who have a certain genetic makeup are more vulnerable to becoming psychotic.

One gene in particular, if you have a combination of an abnormality in that gene,

you have a seven fold, so that's a 700% increased risk of becoming psychotic if you are a heavy user of marijuana.

So not for everybody, but for everybody, the risk is somewhere between two to four times, especially if you start young.

And now it's the young that are suffering.

From the idea that marijuana is innocuous, because it's not innocuous, but because they think it's innocuous, I think psilocybin is going to go the same way.

When the perception of the dangerousness of a drug goes down, its use goes up.

And that's what we've seen.

And teenagers who use...

have a higher incidence of anxiety, depression, suicide and psychosis in their 20s.

And so you're taking a developing brain and altering how that brain develops.

And what we're seeing is the highest incidence of brain and mental health problems in young people we have ever seen.

A study from the CDC, 57% of teenage girls report being persistently sad.

57%?