I have a question as to how significantly can ALA affect blood sugar levels?

I had a 2 hr GTT in mid September. The resulrs were that my blood sugar level was 95. I have been taking 800 mg daily since about mid June. When the GTT was scheduled I had planned to hold off the ALA for a week prior to taking the GTT. However, the GTT appt. slipped up on me and I did not do that. I did remember to stop taking the ALA the day prior to the GTT.

Have I been taking ALA long enough (do I have enough of it in my system) to push my blood sugar levels down so as to present a false GTT response?

Thanks for your responses!