where to inject b12 thigh Injections at Home - Safety Guide for Self-Administration Vitamin B12 Injection Sites: All
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So, a 1 mg dose of B12 is the same as 1000 mcg

For both surveys, the responses of the panelists were anonymous

People with Digestive Issues: Conditions like Crohns disease, celiac disease, or irritable bowel syndrome can interfere with B12 absorption, making injections a more effective method of getting the nutrient

[1] Persistently high B12 levels warrant medical investigation, as they may signal liver disease, kidney dysfunction, or certain haematological disorders
