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The symptoms of a B12 deficiency include fatigue, difficulty breathing, weakness, headaches, and more because the bodys red blood cells arent getting enough oxygen

The procedure is quick and causes minimal discomfort, similar to a routine vaccination

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

How do I know if I need B12 supplementation