E numbers: An Edible Adventure Season 1 Episode 3 Sweeteners ( Air Date 2010-09-09 ) Genre Documentary category. Overview "Stefan looks at E number sweeteners used to replace sugar and also learns about the chemicals used to hold our food together. He looks at how E numbers keep the ice out of ice cream, discovers the seaweed that's an E number found in our cakes, and even undergoes MRI scans in an attempt to discover whether E number sweeteners are clever enough to fool our brains.".