I agree that sweeteners may provoke an insulin response, but I think I am one of the lucky ones where it doesn't. Thank goodness. Or maybe it is just that the response is too small to show up.
To explain: I don't have any way of actually measuring my insulin, but my insulin resistance is easily tracked, since it affects my baseline readings (the less insulin resistance I have in a day, the lower my lowest readings go). So I can judge insulin resistance levels and track them by the way my exercise and carb intake cause my baseline readings to fluctuate. Discovering this was a handy benefit of the Freestyle Libre. Anyway, no matter how much erythritol and stevia I consume, my baseline readings don't fluctuate. Yet they DO fluctuate significantly with exercise and raised carb intake. So I conclude (n=1) that if these sweeteners did raise insulin levels, there would be a visible rise in insulin resistance too - and there isn't. While there is a visible drop in insulin resistance with exercise and a rise with carb intake. Hope that made sense.