Thank you for your answers.
If I understand correctly, IV Vitamin C had much impact but then what about the immune supplements? If you went from 0% to 100% relief with pre-pack before and after IV Vitamin C, and if you didn't get any symptom from the supplements alone, are you sure that they did anything?
As for me, I have tried many elements of nanna's stacks. AHCC for one month didn't do anything. Liposomal vitamin C didn't seem to help either, but the dosage was inferior to nanna's. Zinc for two days triggered important tachycardia and fatigue/weakness, in at least three trials. I guess that this is due to immune activation. I'll try to take it anew for a longer time but I'm a bit frightened by the heart symptoms. Vitamin D3 had mixed effects (lessening some symptoms, vastly increasing others, as I reported elsewhere). Copper seemed a bit similar but I need to try it again. L-theanine gave me serotonin symptoms even in low dosage. I'm still very interested in IV Vitamin C therapy but it's much less easy to get than a supplement, of course.