what does b12 injection contains VITAMIN B Complex Extract With Vitamin

The amount of time it takes to build up vitamin B12 levels in the body can vary depending on the severity of the deficiency and the method of treatment

High doses of B12, often used to treat deficiencies, may cause side effects such as headaches, nausea, diarrhea, fatigue or weakness, and tingling in the hands and feet

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48,49 In this situation, measurement of serum methylmalonic acid and total homocysteine is useful in making the diagnosis of vitamin B12 (markedly elevated levels) deficiency in patients who have not received treatment, including those who have only neurologic manifestations of deficiency