Professor Tim Spector

So our aim is to build up the good bugs and the more you build them up, they squash out the bad bugs, the ones that like eating the burgers and the bad food and the terrible quality fats and the artificial substances.

So you're squashing them out by starving them and you do that by feeding them properly.

So that's the...

That's the concept, if that makes sense.

No, not as far as I know.

Oh, really?

I'm talking – I know about coffee at an epidemiological level, so there have been multiple studies, like I was saying, between coffee drinkers, non-coffee drinkers, seeing what happens to them 20, 30 years later.

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

So there may be other studies showing it does something –

to your brain.

But generally, everything I've seen is beneficial.

I've not seen anything negative, although there are some people who react to caffeine badly.

So there's always a personalized element to it.

Sleep disruption and stuff.

Yes.

So you might be a metabolizer.

It doesn't metabolize quickly in you.

So that caffeine is hanging around longer.

So they're the only

downsides to it for some people.