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
The metabolism and excretion of methylcobalamin may be affected by liver health
Tissue-based map of the human proteome
Choose a postnatal vitamin that includes a wide range of vitamins, minerals, and other important nutrients, including DHA, choline, iron, zinc, folate, B12, and vitamin D
Common temporary side effects include: Mild redness Slight swelling Bruising Tenderness Minor itching These usually settle within a few days
Dont expect weight-loss or a big energy boost from B12 unless you were deficient (Mayo Clinic)