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Side Effects of Excessive B12 Intake Whilst vitamin B12 toxicity is uncommon, several adverse effects have been reported in association with very high B12 levels, though establishing direct causation remains challenging

While oral supplements can help, they often dont absorb as effectivelyespecially for those with digestive issues

For patients with severe kidney disease, impaired renal function can affect how excess B12 is cleared from the body

Hospira Bacteriostatic Water is particularly important for individuals who require frequent injections, such as those undergoing certain medical treatments

According to WebMD, to treat B12 deficiency: Injecting 0.2 mcg/kg of vitamin B12 into the muscle or under the skin once daily for 2 days, followed by a 1000 mcg injection daily for 2-7 days and another 100 mcg injection weekly for 4 weeks thereafter has been used

However, many people may be deficient in this vitamin due to various factors such as age, diet, or certain medical conditions