A vendor that markets a research peptide for human use, or makes health claims about it, steps outside research-use-only rules and can draw action from regulators like the FTC
Cardiovasc Res 36:276281 Masaki I, Yonemitsu Y, Yamashita A, Sata S, Tanii M, Komori K, Nakagawa K, Hou X, Nagai Y, Hasegawa M et al (2002) Angiogenic gene therapy for experimental critical limb ischemia: acceleration of limb loss by overexpression of vascular endothelial growth factor 165 but not of fibroblast growth factor-2
It moves offshore (particularly to China) and into black market channels, with no prescriber oversight, no lot testing, and no accountability to anyone
So if you have any of the below symptoms, you most likely need B12
See something you like but unsure how it works with your body