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By dosage, the mean changes were: 500 mcg: 127% 750 mcg: 176% (single study) 1,000 mcg: 280% 1,500 mcg: 310% 2000 mcg: 260% 5,000 mcg: 62% While 1,500 mcg of vitamin B12 showed the highest average increase, the effect plateaued or declined at higher doses, suggesting a possible saturation of absorption pathways

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Description Description POLYBCOM Vitamin B Complex with Vitamin B12 Injection Support your bodys energy, nerve, and metabolic health with POLYBCOM Vitamin B Complex with Vitamin B12 Injection

Last medically reviewed: 2026-04-27 by GLP3 Planner editorial