b12 injections london clinic Vitamin injection Vitamin B12 & D Injections

Clinical research shows that while some vitamin B12 is absorbed directly into the bloodstream via membranes in the mouth, much of the dose is still swallowed with saliva and absorbed in the same way as a tablet

About 3-8 mcg of B12 is secreted into the GI tract daily via the bile

These are typically intramuscular injections starting with high doses weekly, then switching to monthly 1,000 mcg doses for the rest of a patients life (No Stomach for Cancer, 2023)

Adequate maternal pyridoxine levels are important for fetal development, and the vitamin is present in prenatal vitamins in amounts roughly equivalent to the Recommended Dietary Allowance (around 1.9 mg per day for pregnant women)

Any excess gets excreted in the urine