too much b12 injection side effects Vitamin Injections: Good or Bad? 5 side effects of excessive

Conversely, some studies show that a deficiency in vitamin B12 may cause appetite loss, potentially leading to weight loss if left untreated ( If youre low or deficient in B12, your healthcare provider will likely recommend oral vitamin B12 supplements or injections to increase your blood levels ( summary Low levels of vitamin B12 can cause megaloblastic anemia, which is characterized by shortness of breath, headaches, and fatigue

High doses too frequently may lead to rare side effects like low potassium or vascular stress

It's when your body can't make intrinsic factor, the protein needed to absorb B12

Many researchers report this combination outperforms either method alone

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