The aim is to restore vitamin B12 to a healthy level and then maintain it safely. Doctors usually determine dosage based on blood test results
Potential side effects can include, but are not limited to, the following: Acute kidney injury (typically due to nausea and vomiting) Diabetic retinopathy (damage to the retina, the light-sensitive layer of tissue at the back of the eyeball) Gallbladder dysfunction Abdominal pain and/or bloating, constipation, diarrhea, nausea and/or vomiting Decreased appetite, which can lead to weight loss Increased heart rate Medullary thyroid carcinoma (cancer of the thyroid gland)
It depends on your specific needs
None of that is complicated for a trained professional, and that is the point worth stressing
If you inject only once a week or worse, once a month youll barely see any improvement
Light exposure can harm the formulation and affect its efficacy, so store with no exposure to light