After initial series is done, frequency is different for everyone, depends of metabolism, lifestyle, diet, stress, and other factors Who can benefit from a B12 shot
J Rheumatol (2007) 34(11):214453
Some might (probably would*) be carcinogenic or outright poisonous
The full certificate of analysis for your exact batch is published online and available for verification
For intramuscular injections, the needle should be 2/3" of the thickness of your tissue
Possible Side Effects Pain, redness, or swelling at the injection site Nausea, dizziness, or headache Mild skin rash or itching Rare allergic reactions seek medical attention if severe symptoms occur