Dr. Sagen Zac-Varghese

No, I don't know how they do it.

I don't really know how they do it.

I'd love to find out.

So I don't know enough about astronauts, but I know that they have to do a lot of exercise programs to keep their muscles strong and to try and help their bone remodeling.

So if you log on to the NASA website, you can see there's a lot of research about bones and trying to help those astronauts in space.

I think so.

And I'm interested in stories because I think when you're teaching medical students, you've got to make it interesting.

And there are a lot of stories within this field.

Absolute pleasure.

Thank you.

It's a pleasure.

Yeah.

Calcium is an essential mineral.

So we can divide the role of calcium into two main parts.

Firstly, structural.

We have around a kilogram of calcium in our bodies.

And 99% of that is found in the bones.

It's a huge structural component in our bodies.

The remaining 1% is found in every single cell in the body.

And that 1% of calcium is important for intracellular signaling.