b12 injection route of administration how many cc should i inject much vitamin in an Are Shots Right for You? Vitamin B12 Injection Dosage for – B12 Injection Dose: 7 Guidelines – Ivy Grove Surgery : Self-administration

This is especially important for patients with absorption issues such as those with digestive conditions, low stomach acid (common with aging), or MTHFR gene variants who cannot adequately absorb B12 from food or oral supplements

Amino Acids vol

For those with inflammatory bowel disease, celiac disease, SIBO, gastric bypass history, or chronic GI symptoms that may impair oral nutrient absorption

Tong, Q

But an association seen in groups of patients is a long way from a prediction about any one person, and the authors note that the causes of a high B12 are multiple and its consequences not clearly established