At the risk of sounding like a TV game show host or a question card from Trivial Pursuit – how do they make insulin?

It’s a question that I found myself asking the other day when I was reading the label of my Novorapid vial which says;

“The active substance in Novorapid is insulin aspart produced by biotechnology. Novorapid contains the following other substances: Glycerol, Phenol, Metacresol, Zinc Chloride, Disodium phosphate dihydrate, Sodium Hydroxide, Hydrochloric acid and Water for injections”.

It’s quite amazing when I think about it but I have absolutely no idea how insulin is made these days! I’m imagining labs filled with all sorts of technology and I did manage the find the image you can see…

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