Is there a device to test STRICTLY insulin levels?

From my understanding foods with a high glycemic index increase your blood glucose levels but foods with low glycemic index that contain say... fructose increase your insulin levels and (depending on its index value) little to none of your glucose levels. So when I test my glucose it doesn t neccesarily reflect my... show more From my understanding foods with a high glycemic index increase your blood glucose levels but foods with low glycemic index that contain say... fructose increase your insulin levels and (depending on its index value) little to none of your glucose levels. So when I test my glucose it doesn t neccesarily reflect my insulin, which is my main concern.
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