Professor Tim Spector

responding the wrong way to signals from the rest of the body.

But it suddenly all comes into focus about how holistic the whole system is and how really the brain is just another organ.

And this link with the gut is absolutely crucial because that's where it gets most of its information from.

We have this vagus nerve that goes from our gut to our brain, the longest nerve in the body, and 80% of the signals go gut to brain.

Only 20% go brain to gut.

So all these things together have just made me realize how important what going into our gut is, our diet is, and how that influences many things in our brain that I didn't put together before.

And I don't think most of the medical world have put together before.

We've all put the brain on a pedestal, I should say.

We think it's this unique thing that's driving our bodies, but actually it's not.

It's just responding to them just like any other organ.

No, it's your own fault.

You're in a bad mood.

Why are you in a bad mood?

All these studies, you know, we've got four studies now where we're changing people's diets and they're going, they've been on generally bad diets, we're moving to good diets.

that mood, particularly energy levels, the first thing they notice, they're improving.

And they never linked

Just like you, their mood and energy levels with things like diet, it was just inherent.

They thought, oh, it's just because I'm, you know, my life's shit or whatever it is.

An extreme example is some families we've been working with doing a Channel 4 series at the moment called What Not to Eat.

And we visit four families and they've got terrible diets.