Food Unwrapped continues its mission to uncover fascinating food facts. Matt Tebbutt visits Argentina to find out why our sunflower seeds are so much pricier than the ones that you’d give to the birds in your garden. In Yorkshire’s rhubarb triangle, Amanda Byram is plunged into darkness in her quest to learn about forced rhubarb, and she learns how this traditional pudding staple can grow without any light at all. And Andi Oliver reveals how much added sugar goes into some of our favourite takeaway milkshakes.
Food Unwrapped – Monday 8pm on Channel 4