any side effects to b12 injections How Quickly Does Shot Work? Does It Help Lose Weight? Side Effects of Vitamin B12

These may include: Nausea and stomach upset Diarrhea Constipation Injection site redness or swelling Itching Headache Dizziness Blood clots Swelling In rare cases, some people may experience an allergic reaction to vitamin B12, which can cause symptoms such as hives, difficulty breathing, and swelling of the face, lips, tongue, or throat

A serum B12 level above 900 to 1,000 pg/mL is generally considered elevated

Obviously, alcohol is a toxin and puts your body under some strain to detoxify it - the more you drink, the more strain to remove it from your system

Serious adverse effects are rare but have been reported, particularly with IV administration of thiamine