In addition, people who take a vitamin B12 overdose, especially in parenteral form, may be affected by reversible skin reactions
Pre-existing atrial fibrillation or structural heart disease requires specialist review
In an online survey, almost one third of 683 participants reported cancellation of B 12 injections during the covid-19 lockdowns, with subsequent worsening of symptoms and often with negative emotions and feelings including anger, fear, disappointment, feeling let down, and feeling undervalued.66 In contrast, those who were self-administering B 12 injections or who were rapidly taught to do so reported a noticeable improvement in their symptoms and quality of life, with some benefiting from increasing the frequency of injections to suit their personal need.6566 What are the harms
It is a small molecule, not a true peptide, even though it is often sold alongside research peptides