Intravenous vs Oral Absorption
Intravenous delivery achieves 100% bioavailability because nutrients enter the bloodstream directly, bypassing the digestive system entirely. By comparison, high-dose oral vitamin B12 supplements have an absorption rate of only 1.3% to 2% according to the National Institutes of Health Office of Dietary Supplements. This difference makes IV therapy the most efficient method for restoring nutrient levels rapidly.
