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This effect is thought to be mediated through GLP-1 receptors in the cardiovascular system and is generally not clinically significant, though patients with certain arrhythmias or those sensitive to heart rate changes should be monitored

While most patients tolerate B12 shots well, mild side effects can occasionally occur, including minor pain or redness at the injection site, mild diarrhoea, or, in rare instances, an allergic reaction

Although it is completely safe for pregnant woman to have a B12 injections, we do need written consent by a General Practitioner GP

Researchers must carefully consider these pharmacokinetic challenges