Yes on request, batch-specific COAs may be available where applicable for transparency and laboratory documentation.
Zinc and selenium are key
For those interested in B12 for mood and focus, studies suggest a connection between vitamin B12 and neurotransmitters involved in emotional balance and concentration
Whats the difference between taking NAC supplements and getting it via IV
Sterile solvent: You will need a diluent such as sterile water for injection, bacteriostatic water , or other buffer/saline solutions (e.g., 0.9% NaCl, acetic acid, etc)
If symptoms persist beyond a few days or worsen, contacting a healthcare professional is important