That is 10 to 35 percent of your total vial content
The research record is based on animal models and mechanistic reasoning
Vitamin B12 can then be absorbed into the bloodstream via endocytosis in the distal ileum, or by passive diffusion in the absence of intrinsic factor.2 Pernicious anemia (an autoimmune disease) affects the gastric mucosa, leading to destruction of parietal cells and failure to produce intrinsic factor, resulting in vitamin B12 malabsorption and eventually deficiency
Content Enjoy sex like you used to Reviewed by Kelly Brown MD, MBA Written by Daniel Yetman Published 07/05/2025 Updated 06/30/2025 Vitamin B12 overdose is so rare that serious adverse effects from consuming large amounts of vitamin B12 have only been reported in a handful of studies in the medical literature
Vitamin B12 is a water-soluble vitamin, which means your body typically excretes any excess it doesn't need through urine
Mood changes, including depression or irritability, can also be related to low B12 levels