nad+ glutathione DAVINCI Laboratories Activate with - Cellular Energy Support, Brain Health & Healthy Aging* - Vegetarian, Soy Free & Gluten Free Longevity Support: Bioavailable NAD+ and
Description
Researchers utilize it to explore the relationship between specific amino acid modifications and biological activity, informing the optimization of peptide therapeutics and the development of novel analogs

So they turned to compounders, which have legal discretion to make cheaper versions of approved drugs when access is limited

Sep 2012;14(5):321-4

Antibiotics typically work by inhibiting a single function of bacteria (synthesizing cell walls, producing proteins, replicating DNA, etc.)
