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Conclusion: Optimizing Your Vitamin B12 Therapy Getting the most out of vitamin B12 therapy is key to good health

What to expect: Improved sleep depth and quality Subtle energy improvements Possible injection site reactions (mild, temporary) Phase 2: Optimization (Months 2-3) Benefits become more noticeable as growth hormone levels optimize

Boosting your immune system and topping up your levels of B12 to prevent anaemia

J Infect Dis 160:777782

The following table summarizes common claims and their evidence basis: The key pattern: most benefits are real only for individuals who are actually deficient in B12

Acknowledgments The authors thank Feng Liu for assistance with the graphics