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"Cyanocobalamin reductase / alkylcobalamin dealkylase (MMACHC, Human)"
18 (7), e45
Taking extra B12 when your levels are already normal is not known to add energy or other benefits
Like all good things, too much of any vitamin or mineral can stir up trouble
If you are deficient in vitamin B12, it can lead to health problems, including: Weakened immune system Cognitive decline Anemia Cardiovascular disease Depression or anxiety Reduced mobility Low levels of vitamin B12 may contribute to bone loss, especially as you get older
A 50 mg vial mixed with 3.0 mL of bacteriostatic water gives about 16.7 mg/mL, and the example subcutaneous range is 2.5 to 5 mg per day
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