Yes!
When my blood sugar runs high (generally because I cheated on my diet) a cup of herb tea that includes licorice seems to help correct things. Not on the spot, but over the next twelve hours.

Just recently I happened to try different timing and seem to have a repeatable benefit even more quickly. I used to drink a cup of green tea in the morning, but recently realized that was giving me higher morning blood *pressure* readings, so discontinued it. Instead I decided to try one of my herb/licorice teas. And, wow! My pre-lunch blood glucose reading is 10-20 points lower than expected - even if I cheated a little at breakfast! So then what about pre-dinner? Yes, still!

I have some concern about side-effects of licorice so have always limited this to no more than one cup every other day.

These teas are available under various brands at Trader Joe's and most supermarkets.

Worth a try!

One more thing, this is the order: first the cup of tea, then my morning reading, which is normal. Then breakfast. Before lunch I take a good walk, a mile or two - about the best thing there is for blood sugar control! Then my pre-lunch reading which comes in really great! This makes me wonder if the mechanism is limiting the release of glycogen, so that exercise lowers blood glucose and it doesn't get flooded back in.