If I understand this correctly, the potential problem lies not with the citric acid itself, but with the fungus we use to produce it, traces of which can make i

If I understand this correctly, the potential problem lies not with the citric acid itself, but with the fungus we use to produce it, traces of which can make it into the end product and might cause allergic reactions. I'm surprised, I thought citric acid was created synthetically. Does anyone know how much more expensive would it be to synthesize it without involving an organism?