One thing I know from experience is that bunch fo NBE herbs, especially prolactin boosting ones can make blood sugar levels crash quite a bit. I'm very sensitive to this effect and having been on Pioglitazone made me extra aware of it, Pio does exactly the same effect about 30-45 minutes after taking it.
So anyone sick with diabetes should pay attention to what type of NBE they take and make sure they wont get a huge blood sugar crash after taking their NBE. It usually wont matter if morning stuff is taken just before or after breakfast for example, but taken to empty stomach and fasting few hours more, like I often do, can cause a glucose crash. This was especially tough when I took my Pio first thing in morning along with NBE and HRT meds.
I think the way to deal with this is either pick such items which wont cause much of a change, or splitting the dose throughout the day and timing it with meals. Or be crazy and just soldier through it like I did, but then again, I'm not diabetic, just sensitive to blood sugar changes.