Extend bars

Just wondering if any one has tried these.   They claim to not impact blood sugar.  We've given Jeremy them occasionally and they don't raise his bg,  and we don't bolus for them.  Seem to be great for activity.  Any one else out there tried them?

OOPS!!  What I'm talking about are the Extend bars.  We've tried the Choc. Delight Extend bars.  They are sold at most Walgreens.

Are these sold at Walmart pharmacy? No walgreens here.