We keep a small stock of dried methi leaves (fenugreek), as a use I learned from my mother, who got it from Asian Indian friends, is to add it to cauliflower when used in curries - it tastes fabulous!
Since then, I have also stocked methi seeds, but I haven't yet really tried the spice on its own, to see how it tastes.
If it's also good to reduce BG levels in diabetics, so much the better, as long as it's controlled carefully. Who knows how much would be over-use, in this context?