Recent surveys have linked academia and PhD studies to a risk of experiencing mental health issues. Despite the lack of extensive data, the negative impact of the stresses of lab life should not be underestimated, and PhD students and research trainees should be supported.

It was discussed here at https://news.ycombinator.com/item?id=19322834.

Repeating a comment I made in the above discussion, here are a couple of relevant quotes from Freeman Dyson (who does not have a PhD):

“Well, I think it actually is very destructive. I'm now retired, but when I was a professor here [Institute for Advanced Study in Princeton], my real job was to be a psychiatric nurse. There were all these young people who came to the institute, and my job was to be there so they could cry on my shoulder and tell me what a hard time they were having. And it was a very tough situation for these young people. They come here. They have one or two years and they're supposed to do something brilliant. They're under terrible pressure — not from us, but from them.

So, actually, I've had three of them who I would say were just casualties who I'm responsible for. One of them killed himself, and two of them ended up in mental institutions. And I should've been able to take care of them, but I didn't. I blame the Ph.D. system for these tragedies. And it really does destroy people. If they weren't under that kind of pressure, they could all have been happy people doing useful stuff. Anyhow, so that's my diatribe. But I really have seen that happen."