"The LC diet, which was high in unsaturated fat and low in saturated fat, achieved greater improvements in the lipid profile, blood glucose stability, and reductions in diabetes medication requirements, suggesting an effective strategy for the optimization of T2D management."
I haven't heard of any formal studies where they got off of medication 100%; I've only heard of n=1 studies (single person reporting) where that has happened. The most remarkable n=1 is this from a type 1 diabetic: https://www.reddit.com/r/keto/comments/2rnn9b/doctors_can_su... but in this case the person is still on it which isn't a surprise as they are type 1.