Is this what you are asking about
https://www.robinsons.com.sg/products/healthy-first-blood-guard-complex-60-capsules?variant=
It claims that the main ingredient is green coffee extract, I have never heard of that being beneficial for blood sugar control.
I am sure that some herbal remedies or supplements can be beneficial, but I would think that all of the really effective ones have been tested, proven to work before being licensed as medicines.
I have a sneaky suspicion that at 69 dollars for 60 capsules the only thing they will lower is your bank balance .
If you are looking for an alternative to drugs the best advice I can think of is not to eat the things that cause high blood sugar.
Have a look at the nutritional thingy, the link is below