Potential Risks and Side Effects of B12 Injections Whilst B12 injections are generally considered safe due to the vitamin's water-soluble nature (excess is excreted renally), several adverse effects and risks warrant consideration
The peptide gene expression effects extend far beyond hair follicles
Riboflavin (B2): Riboflavin works together with the family of B-complex vitamins to provide the body with energy by metabolizing carbohydrates, fats, and proteins
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Observational studies A large number of cross-sectional and prospective cohort studies have associated elevated blood homocysteine concentrations with measures of poor cognitive scores and increased risk of dementia, including Alzheimer's disease (reviewed in 67, 69)
Fatal hypokalemia may occur when severe megaloblastic anemia is treated intensively with vitamin B12, as a result of increased erythrocyte potassium requirements