Before me or my wife fly, the day before we each do a liter IV with added Vitamin B Complex, Vitamin C, Zinc, Amino Acid Blend, and Glutathione. All IV vitamins at max dose of course.
Hydrates and gives optimal vitamin replacements with no waste like all oral vitamins (though we take two oral OTC vitamins daily). All vitamins mentioned above in IV are water soluble, so whatever your body doesn’t want or use is just excreted over the next 5-7 days depending on your metabolism.
Has helped us evade “the plague” when flying and/or traveling with family. Been doing this little cocktail for 5 years now, only at 2-4 times per year too.