In this extra bonus episode, Neil talks with Sam and Alessandra about why getting plenty of nitrogen in the soil is good for making amino acids and therefore protein.

You can follow the A is for Apple Podcast on Instagram and X (Twitter).

Sam Bilton also hosts the Comfortably Hungry Podcast and is the author of First Catch Your Gingerbread, Fool’s Gold: A History of British Saffron and The Philosophy of Chocolate. You can find her on Instagram and X.

Dr Neil Buttery also hosts the British Food History Podcast and is the author of A Dark History of Sugar and Before Mrs Beeton: Elizabeth Raffald Britain’s Most Influential Housekeeper. You can find him on Instagram and X.

Dr Alessandra Pino also co-hosts the Fear Feasts Podcast and is the co-author of A Gothic Cookbook. You can find her on Instagram and X.