Professor Tim Spector

Calorie-restricted diets have been shown for the vast majority of people not to work.

Your hunger signals go up and hunger is the main driver of obesity.

And we'll get into the other rules.

And what about coffee?

So drinking between two and five cups of coffee reduces your risk of heart disease by about 25%.

And then what do you think of almonds?

So there's lots of studies showing they're good for your cognition and mood.

I think from a public health perspective, they're going to transform medicine and we ought to be taking it much more seriously.

But I've got two real worries about them.

My first worry is that

That's my lovely mum, June, who is still with us, aged 93.

But for the last seven years has been in a home in London after suffering a stroke and then developing dementia.

And so, yeah, that's changed some of my views on life.

And she was really pro-euthanasia and signed every paper possible that if this ever happened to her, you know, she would be able to end her life.

But unfortunately...

That didn't come true.

And under UK law, it's not possible to help her in that because she lost capability and mobility very early.

So she's still there, but she no longer recognises me.

It's a reminder of our potential future life and how so many people are going to end up with dementia.

That wasn't the case 50 years ago.