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When To Call Emergency Services Call emergency services immediately for any breathing difficulty, throat or facial swelling, or sudden collapse

Two primary tests measure the amount of B12 in blood (low in B12 deficiency): Total B12 test: measures total amount of B12 Active B12 test: measures amount of B12 that is available to the cells Two secondary tests measure function of B12 in the cell (raised in B12 deficiency): MMA: measures function of B12 in the mitochondria Homocysteine: measures function of B12 for methylation How does Vitamin B12 deficiency get diagnosed

While most patients tolerate the medication well, some individuals report skin changes, including itching, during their treatment journey

Generally, people with a BMI of 30 or higher (classified as obese) might qualify for weight loss medications

Bruising at the injection site