Free lesson

You’re not alone: how common it is

Lifetime-common, and treatable

What you learn hereExplain that mental disorder is lifetime-common (~1 in 2 by 75), not “everyone at once” (~1 in 7 now), that it usually starts young without later onset being worse, and that it is treatable — without pathologizing ordinary sadness.

Picture eight people you know. How many will face a mental disorder at some point in their life?

There are two numbers we tend to confuse: how many people right now, and how many across a whole life.

Right now, about one in seven people is living with a mental disorder. That's the snapshot of this moment.

But added across a lifetime, by about seventy-five, it's nearly one in two. Lifetime risk, not today's state.

And one figure changes how you read all this: it usually starts young. The age of highest risk of onset is around fifteen, and the median age of onset is around twenty. It isn’t weakness: it starts at a stage when both the brain and the life around it are changing a great deal. And starting later isn’t unusual or worse: the door to asking for help doesn’t close with age.

That’s why arriving early matters so much. And if you didn’t arrive early, it almost never was for lack of wanting to — at that age, help often simply isn’t there.

The line is a threshold, not a wall: normal sadness isn't a disorder. And what's common here is treatable.

Lifetime-common, treatable, and nothing to be ashamed of. If it's you, you are not alone.

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SourcesMcGrath 2023 · OMS 2025 (GBD 2021) · Kohn 2018 · Updated 2026-07-25