If the question is "which peptide is easier to access without a prescription," AOD 9604 wins again
Notes that high-dose niacin passes into breast milk and that lipid-altering doses could pose risks to nursing infants, recommending caution or avoidance of such doses during breastfeeding)
For instance, hospitalized patients with severe alcohol-related malnutrition might receive 1 mL IM daily for a week
A person who ingests too much vitamin D may feel nauseated, weak and lose their appetite
It must be absolutely clear in the advertising of such products that they do not have a medical purpose. So the same B12 (hydroxocobalamin in this case), from the very same manufacturers, is at the very same time
The other option would be to take a supplement, which would take many hours in the digestive process and would lose much value along the way