I'm been "playing" with glucophage the last month and even when on a keto diet I've taken 500mg and had very very little effect on blood sugar values , maybe 5-7 points change as check with meter.
I've taken 1500mg with a meal containing 500g carbs (pancakes and eggs with syrup) and the blood sugar levels did go up but only about 15 points and only stayed their for about 30 min
Now I haven't checked it with taking HGH YET , but will come when prep time gets closer
Rightnow I take in about 400g a day total carbs , probably 1/3 of that is from fruits , I take 500mg with the breakfast , then 500mg every 3 hrs their after till 1

m aftrer that i cut my carbs for the day