Yes, ACV is one of the 'natural' treatments that I can actually see affect my blood glucose levels in a good way! And I am not the only one, according to studies they have done. For me, though, I have to actually have it in liquid form for it to have that positive effect. (I tried taking supplementary pills, but I couldn't see any effect at all in my fasting blood glucose levels.)
I have found the perfect way for me - two teaspoons only, in a medium sized glass of boiled water, sipped slowly. I can't have it too late at night, as I find it to be an energising tonic drink! (If only I had discovered this in my youth!) (Then I wouldn't have the gallstone I have today, I tell my adult children!) (I first read about ACV when I was young, but I didn't like drinking it, **** it.) So, if and when I remember, I am starting to drink it around 9 or 10pm. (I drink ACV to help my body deal with those glucose-dumps in the wee hours of the morning.)
I've often wondered how it works - as works it really does for a variety of ailments as this thread is attesting to. The best explanation I have read is that it makes our bodies more alkaline, in a food environment that makes our bodies too acid for really good health.
http://thehealthyeatingsite.com/benefits-of-apple-cider-vinegar/
And it also has anti fungal, anti biotic, anti viral qualities (helps kill the baddies in our bods in other words!).
Go ACV!