With one of the lowest breastfeeding rates in Europe, many parents in the UK feed their babies formula milk. But what's actually in it?

Sheila Dillon discovers why it's an industry steeped in science and secrecy as well as controversy.

Journalist Ella McSweeney reports from a lab to explain how its made and why formula is at the heart of Ireland's ambition to become a powerful global food player.

Producer: Ruth Sanderson.