NAD+ is a coenzyme found in every cell that helps convert nutrients into energy
The injections are FDA-approved and performed by trained professionals
It will often not happen on the first GSH (it can of course) but if there are methyl cycle slow downs and then yOu supply the B Vit cofactors and a methyl donor suddenly the methyl cycle donates more and more to the HCYS-Cystathionine pathway (which primes sulfite formation and SUOX) and THEN you give GSH which also donates to the same pathway A sulfite reaction can look like anaphylaxis and can have hive reactions and all you mention
The standard reconstitution workflow for most research peptides using bacteriostatic water is straightforward: allow the lyophilised peptide vial to reach room temperature, add the appropriate volume of bacteriostatic water using a sterile needle and syringe, swirl gently (do not shake vigorously, as this can cause peptide aggregation or degradation), and allow to stand until fully dissolved
Store the sealed vial at -20C, protected from light and moisture
However, it is recommended to perform a patch test when combining new products