Is DGI food really good? Is it really useful for sugar control?

If the doctor didn't recommend DGI food to me, I don't know if I can control my blood sugar by changing the staple food. Thank me for my hard work in sugar control and taking medicine. Sugar control is really hard, not as good as delicious potato chips and instant noodles, but the food we can eat tastes ok. The key is health. The most important thing is that it can control sugar and directly replace dinner with DGI food. Low GI food such as DGI food is really worth popularizing.