how much b12 can you inject Injection Dosage and Frequency: 7 Guidelines for Adults How Often Can I Take

This makes injections highly effective for pernicious anaemia and other malabsorption syndromes, including post-gastrectomy states, Crohn's disease affecting the terminal ileum, and certain medications that interfere with B12 uptake

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In very simplified terms, one could say that methylation functions like an on/off switch in many contexts

High-dose methionine (above 100 mg per injection) can elevate homocysteine levels in susceptible individuals, increasing cardiovascular risk if used long-term without folate co-supplementation

New insights into erythropoiesis: the roles of folate, vitamin B12, and iron