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Once a store of vitamin B12 is built up, this can supply the bodys needs for several months
The upper arm The back of the upper arm works well but presents a practical challenge: most people cannot comfortably self-inject in that location
FAQ Is it safe to take glutathione every day
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
Zhu, H., Blake, S., Chan, K
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