Selank has an IV half-life of just 46 minutes, making it one of the shortest-lived peptides on this peptide half-life chart
[10] [11] Intramuscular B12 injections (hydroxocobalamin or cyanocobalamin) bypass the digestive system, but UK product information (SmPCs) for hydroxocobalamin injections does list gastrointestinal disturbances, including diarrhoea, as possible adverse reactions, albeit rare
HUBERMAN: It's also involved in any of the sort of downstream effects of having elevated LH and FSH, including elevated vitality, which includes both energy and in some cases, libido
Intramuscular B12 Injection Procedure For intramuscular injections, the upper buttocks, shoulder, or thigh are commonly used injection sites
Because of this, some peptide scientists question whether BPC-157 is native to human physiology at all