That being said, taking the supplements when you dont need them may cause side effects like: nausea vomiting feeling tired headaches diarrhea tingling or numbness Serious side effects of the shot are rare, but may include: If you notice any side effects of the pill or shot, call your doc right away
Because cobalamin in normally absorbed from food through the gastrointestinal tract, chronic diseases that adversely affect the ability of the intestines to absorb nutrients (inflammatory bowel disease is an excellent example) can lead to cobalamin deficiency
In 2019, an internal medicine specialist could not find an objective cause for his B12 deficiency, and supplementation was stopped
Stomach acid A lack of stomach acid, whether due to medications, health issues, or age, can interfere with absorbing B12 since stomach acid is necessary for the nutrients to enter the bloodstream
How to Prevent and Overcome Vitamin B12 Overdose The Institute of Medicine reports that there are no adverse effects associated with excess vitamin B12 intake from food and supplements in healthy individuals