To get stronger Immune System I can't imagine living without good dosing of Vit C a couple times daily and I've taken Grape Seed Extract for going on 25 yrs for immune system. Never sick here. Now for your MG, I don't know. I see only integrative MD's for my health and they are spot on. Allopathic docs leave a huge void in my life.

You might even google MG and Grape Seed Extract and see what comes up.