Product labeling documents include information like generic names, active ingredients, ingredient strength dosage, routes of administration, appearance, usage, warnings, inactive ingredients, etc
However, it may take several weeks or months for full recovery
Nevertheless, observational studies such as these cannot determine whether low levels of vitamin B12 were the cause of the weight gain or whether higher levels of vitamin B12 protected against lower levels
Vitamin B12 shot side effects Most people tolerate vitamin B12 injections well, but possible side effects include: Mild: soreness or redness at injection site, mild diarrhea, nausea, headache, itching Rare but serious: allergic reactions (rash, swelling, difficulty breathing), low potassium (hypokalemia), dizziness or heart rate changes Get emergency medical help if you have signs of an allergic reaction to Vitamin B12: hives
Risk mitigation
Products are synthesized for high purity & provided in stable lyophilized form for laboratory research