Dietary Supplement Quick Dissolve The Most Metabolically Active Form Suitable for Vegetarians Purity & Potency GuaranteedFor people with B12 deficiencies it is popular to have injectable vitamin B12; however, research supports that oral administration of an appropriate dosage has been shown to produce as good of results as injectable preparations in treating vitamin B12 deficiency. Methylcobalamin (vitamin B12) is active immediately upon absorption, while other forms (e.g., cyanocobalamin) must....