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It can also develop from poor B12 absorption, because some people are not able to absorb it well

Store capsules of B12 at room temperature, not in the fridge

Young adults balancing classes or early careers, parents, and adults 40+ with changing absorption often benefit
The answer depends on your unique health needs and goals

If left untreated, severe vitamin B12 deficiency can lead to complications such as megaloblastic anemia, nerve damage, and neurological disorders
