Most Frequently Reported Effects Subcutaneous peptide injections most commonly produce mild local effects: redness, mild swelling, or sensitivity at the injection site
If you have some of those symptoms especially if you have a low red blood cell count you should talk to your doctor about further blood tests for vitamin B12
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Learn more about what causes vitamin B12 deficiency
Remember that peptides are a relatively new area of research and clinical use, and the understanding of their safety and efficacy is continually evolving
Your skin looks pale or yellow