Possible side effects or risks may include: Injection site pain, redness, or irritation Headache Nausea Fatigue Dizziness Fluid retention Changes in appetite Immune or allergic reactions Unwanted tissue effects Infection risk from improper injection technique Unknown long-term risks Because the long-term safety data for many emerging peptides remains limited, patients should be cautious about anyone promising guaranteed results or claiming that peptide therapy is risk-free
Certain health conditions such as intestinal or stomach problems, poor nutrition, cancer, HIV, pregnancy, old age, veganism, and alcoholism can cause vitamin B12 deficiency
Stupnisek, M., Kokot, A., Drmic, D., Hrelec Patrlj, M., Zenko Sever, A., Kolenc, D.,
Dendritic spine pathology: cause or consequence of neurological disorders
Having a diet high in purines, which the body breaks down into uric acid