why is b12 injections bad for you infowars Efficacy of sublingual and oral vitamin versus intramuscular administration: insights from a systematic review and meta-analysis B12 Shots: Vitamin B12 Injections

However, as reassuring as all of this is, there are a couple of things to remain mindful of: Copper toxicity Because GHK-Cu contains copper, it does pose a potential risk of copper toxicity,12 the symptoms of which include abdominal pain, vomiting, chest pain, chills, cough, fever, general weakness, anemia, burning sensations, tremors, and a metallic taste in the mouth.13 The risk is small, as the concentrations of copper in the peptide are typically well within safe parameters, but its good to be aware of it

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[1] [8] Oral vs Injectable B12: Dosage Differences The route of B12 administration significantly affects the required dosage due to differences in bioavailability and absorption mechanisms

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In: Greene CE, ed