does b12 injections cause joint pain Shots: Vitamin B12 Benefits, Uses, Risks What Conditions Do B12 Injections
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[13] Overall, for the majority of users the side effects are mild and temporary, but anyone experiencing persistent or severe symptoms should seek medical attention

Most will be mild and self-limiting

References Johan F B Arendt, Ebba Nexo

GHK-Cu cycling - typically 30 days on / 14 off or 8 weeks on / 4 off - produces comparable results, reduces cost, limits theoretical copper load and keeps receptor sensitivity fresh
