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One milligram (mg) is the same as 1000 micrograms (mcg)
You don't have to wait around to find out if you are B12 deficient or not
For this reason, even those who consume sufficient amounts of vitamin B12 in their diets could still have a functional B12 deficiency
If switching the route of administration and dosage don't help, you may also have like a substrate issue
For individuals aged 50 and above, adequate consumption of vitamin B12 is crucial for maintaining good vision and protecting against macular degeneration
People with Vitamin B12 deficiencies due to dietary or medical reasons
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