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What kind of reaction does fructose cause for you?
If there would be any fructose in e-juice, I would think it would be in the flavoring. There are only four things in e-juice, Vegetable Glycerin, Propylene Glycol, Nicotine and flavoring. Some people leave out flavoring and/or nicotine. You could try unflavored e-juice to see if that causes a problem.