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PMCID: PMC7489598

Frontiers in Neuroscience, 2018

Eight weeks is a long enough window to observe effects, and four weeks off is a real break that gives the methylation cycle time to normalize before the next block

Many patients have found that over-the-counter supplements like B12 tablets, nasal sprays, and dissolvable capsules do not provide the same level of energy and mental clarity as their injections

The presence of comorbidities can significantly impact the pharmacokinetics of Vitamin B12, making it essential to adjust dosing protocols. Expert Opinion on Vitamin B12 Therapy Genetic Factors Affecting B12 Metabolism Genetics play a role in how well someone can use Vitamin B12

Plans with these benefits are not available in every county