I'm Mariana Spring, the BBC's social media investigations correspondent.

In my podcast, I've been investigating what happened to the daughter of a conspiracy theorist who died having rejected chemotherapy.

It would mean the world to me if I could make it that she wasn't just another in the long line of people that die in this way.

How does this reflect the rise of health conspiracy theories on social media and beyond?

The new series of Mariana in Conspiracy Land.

Listen on BBC Sounds.

BBC Sounds, music, radio podcasts.

Think about the greatest unsolved mysteries, such as what lies at the deepest reaches of the ocean floor,

or go out further across the galaxy and reflect on the enigma of black holes, or consider the

entire universe and theories on the existence of dark matter.

And yet there are still mysteries surrounding things more familiar to us.

Things we interact with every day but rarely ask, what are they made of?

And that something is food.

I was astounded to learn that we actually measure a tiny portion of the molecules that make up our food.

This is Roy Steiner of the Rockefeller Foundation who's overseeing one of the world's most ambitious research projects focused on food.

We measure a handful anywhere from 25 to 150 molecules, traditionally, in most food composition

tables, and yet there are tens of thousands of molecules, many of which we're starting

to understand are really quite important for our health,

and we don't measure them, and we don't understand them. It's like, oh my Lord, like, we measure

less than 1% of the food we actually put into our body. That means we know very little. And that,

to me, was like a shock.

A shock that five years ago sent Roy on a mission to solve some of the mysteries of our food, an endeavor which, as well here, could be as ambitious as a NASA project aimed at explaining the cosmos.

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