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"Principles of long-term dynamics of dendritic spines." J Neurosci 28: 13592-608
Vitamin B12 is also needed to help prevent megaloblastic anemia, which is a blood condition that often makes individuals tired and weak
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When someone is genuinely deficient, they may notice improvement in energy or mental clarity within a few days, though this varies from person to person and is most likely in people who were low to begin with
