Alpha lipoid acid is a great antioxidant but it will do very little for maintaining stable blood sugar levels. There are much better supplements you could spend your money on.
1. Fish oil - fish oil is awesome for increasing muscle insulin sensitivity
2. A good nutrient partitioning supplement like n2slin from n2bm.com
On top of the supplements mentioned, it really just comes down to keeping a healthy diet without any processed foods. That is where those nasty carbs are that cause a crazy insulin spike.