I'm a believer. I have finished reading Glucose Revolution by Jessie Inchauspe. My liver doctor, Dr. Viveiros, recommended this book. I bought it--literally--hook, line, and sinker. I also bought the author's recipe book.
It's worked for me. No more afternoon naps because my glucose level doesn't crash. I've lost weight. I sleep better. And I didn't have to diet, rather just re-order what I ate. Jessie says to eat the vegetables first. It gets the digestive system moving and although she doesn't say you get fuller quicker, you do. Usually, I can't finish my meal because I'm full.
Another hack is to drink apple cider vinegar in water. Yuk! But I can drink Dennissimo vinegar in water--yum.
Of course, I keep up my gym membership.
I found Glucose Revolution life changing.
