b12 injection dosage for chronic fatigue Shots Adults: How Much and How Often How Often Will I Need

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If nausea persists beyond 3-4 weeks on a stable dose, consider reducing to the previous dose level and attempting re-escalation more gradually after 4-6 weeks

Providers familiar with specific syringe sizes may be more efficient and comfortable using them

Large-scale, well-designed trials with proper randomization and blinding are needed to determine whether high-dose oral supplementation is as effective as intramuscular injection for increasing vitamin B 12 status and alleviating clinical symptoms of vitamin B 12 deficiency

B12 is also required for the production of healthy red blood cells and normal circulation during pregnancy