b12 injection with syntrhoid Compounded Hydroxocobalamin (Vitamin B12) B12 Intramuscular Shots in Maui,
Description
Retrieved December 2, 2015

AOD 9604 does not share this effect

For patients without absorption disorders, high-dose oral supplements of 1,000 to 2,000 mcg daily have been shown to be comparably effective at correcting mild to moderate deficiency at lower cost and greater convenience.

Bioavailability of oral formulations is typically 1-3% compared to near 100% for subcutaneous injection

Standard Recommended Daily Allowances vs
