Possible side effects include[10]: Bloating or abdominal discomfort Nausea or vomiting Diarrhea Headaches Dizziness or feeling lightheaded Flushing or low blood pressure Rare but serious reactions, such as allergic responses or irregular heartbeat, have been reported, especially in individuals with heart conditions
And some are simply taking regulatory risk
If a person does not receive treatment for their B12 deficiency, they may develop more serious complications or be at greater risk for certain long-term illnesses
GHK-Cu SubQ vs IM Injection Route: Clinical Comparison Key Takeaways Subcutaneous GHK-Cu achieves 8592% bioavailability with sustained plasma levels extending 72+ hours, while IM produces a sharper peak that clears within 48 hours
Alekos NS, Moorer MC, Riddle RC
These products are for laboratory research only and not intended for medical use