red around b12 injection site Why Do You Need Injections? · PA Relief B12 Shot Guide: Benefits, Dosage

They may have underreported minor discomforts that did not meet thresholds for adverse event classification

There is no established tolerable upper intake level (UL), so even high-dose injections are safe because your system simply eliminates what it cannot use

Wrapping the body in a towel or blanket helps reduce sudden movements and gives you better grip and visibility

Vitamin B12 is also known as cyanocobalamin or cobalamin

However, with direct injection, if you do not need the additional B12, it may result in high levels in your blood that can cause side effects including gastrointestinal issues, headache and dizziness, tiredness and weakness, or skin irritation until the excess is flushed out via your kidneys and urine