The AOD-9604 half life (2-3 hours) is relatively short compared to some peptides like TB-500 (2-3 days) or CJC-1295 with DAC (6-8 days)
Although the vitamin sounds like a single vitamin, there are in fact eight B vitamins that are more of less prevalent in different foodstuffs, and regularly added as fortification to breads and cereals, for example - thiamin (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), pyridoxine (B6), biotin (B7), folate/folacin or folic acid (B9) and cobalamins (B12)
How Can You Take B12
Improved circulation to extremities is a less common but notable report
BPC-157 and TB-500 add different research angles, but GHK-Cu is the strongest direct link to copper peptide and collagen marker terminology
[PDF] tubitak.gov.tr Zhao, Alex Tang, et al