If I take an additional Btwelve supplement without diagnosis of a deficiency will I overdose?

Patient

Q: I'm 15, and have been experiencing bad moods and fatigue. Would it be harmful to take a vitamin B12 supplement of 500 mcg if I have not been diagnosed with a deficiency along with the 9 mcg in my daily vitamin?

Doctor

A:   Vitamin B12 is a water-soluble vitamin that is naturally present in some foods, added to others, and available as a dietary supplement and a prescription medication. Vitamin B12 is required for proper red blood cell formation, neurological function, and DNA synthesis. the recommended daily allowance of vitamin B12 is 2.4 microgram. Vitamin B12 has a low potential for toxicity. Some studes have shown that vitamin B12 supplementation (in combination with folic acid and vitamin B6) did not cause any serious adverse events when administered at doses of 0.4 mg for 40 months and 1.0 mg for 5 years.

Related Q&A

Q: On my home tonight while driving my car, I pulled over and read a message in my car. I ended up sitting in my car for...

Q: My kid is exibiting poor behavior due to consumming suger in large amounts. When his diet is controlled he is fine. H...

Q: How to help my 13 year old girl to grow higher We are concern about my 13 year old daughter growth, (born in Novembe...

Q: I have found two small bumps on my vagina but i have yet to have sex and nor have i shaved down there. But im still a...

Q: I am a 19 year old female and there are a couple of small(about nickle) sized lumps in my butt crack , they hurt if p...

 
DOCTOR ADVISORY BOARD
218

Dr. James Obaji M.D.

  • 247 Reviews
  • Family Physician
173

Dr. Suneel Sharman M.D.

  • 190 Reviews
  • Family Physician
138

Dr. Pat Golden M.D.

  • 169 Reviews
  • Cardiologist
98

Dr. Kunaal Jindal M.D.

  • 112 Reviews
  • Plastic Surgeon
CNN
BBC
MSNBC
CBS
abcNews
FoxNews