b12 injection how often to take Long Does It Vitamin Injections Work? B12 Injections for Weight Loss:

Once a vial is punctured for first use, the in-use BUD on the label applies, typically 28 days

PMC 11448733

Safe Use, Dosage, and NHS Guidance on Vitamin B12 Pills The NHS recommends 1.5 mcg daily for adults, but therapeutic doses for deficiency are much higher oral cyanocobalamin 50150 mcg daily for dietary deficiency, or intramuscular hydroxocobalamin 1 mg for absorption-related causes

Because it is water-soluble, your body naturally filters out excess through the kidneys and excretes it in urine

However, it's important to note that these shots are not a standalone solution for weight management

The severity of side effects can often depend on the individual and the dosage