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The standard NHS maintenance schedule for a non-dietary cause is a 1mg injection every two to three months for life

The pathogenic bacterial overgrowth can consume the Vitamin B12 before it is properly absorbed

16 The aim of this paper is to review the evidence for the use of B12 in clinical practice beyond the replacement in deficiency

Some causes of B12 deficiency are: Pernicious Anemia Autoimmune Diseases Leaky Gut Syndrome Ulcerative Colitis, Crohns and Celiac Disease Small Intestinal Bacterial Overgrowth (SIBO) H Pylori Infection Prolonged Usage of Gastric Reflux meds Vegan and Vegetarian diets MTHFR gene mutations Bariatric Surgeries Excessive Alcohol Consumption B12 and the Methylation Cycle: Methylation is a critical process that happens trillions of times in every cell each minute

People with severe absorption problems or specific health issues might need shots

Frequency depends on your goals and the specific injection