Most community protocols reconstitute the 80 mg vial with 3.0 mL bacteriostatic water (about 26.7 mg/mL total blend) and use once-daily subcutaneous injections starting at small volumes
When you swallow a capsule, that compound must: Wait for the capsule shell to dissolve in stomach acid Survive exposure to gastric acid (pH 1.53.5) without peptide bond cleavage Then be absorbed through the intestinal wall into circulation The problem: gastric acid and digestive enzymes are specifically designed to break peptide bonds which is exactly what glutathione is made of
doi:10.1164/rccm.201308-1483ST
Feillet, F., Ogier, H., Cheillan, D., Aquaviva, C., Labarthe, F., Baruteau, J., Chabrol, B., de, Lonlay P., Valayanopoulos, V., Garnotel, R., Dobbelaere, D., Briand, G., Jeannesson, E., Vassault, A., and Vianey-Saban, C