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A 41-year-old member asked:

Is it safe to take vitamin b3 while pregnant or breastfeeding?

2 doctor answers5 doctors weighed in
Dr. Megan Bird
Obstetrics and Gynecology 20 years experience
Yes: The b vitamins are safe in pregnancy. They are in prenatal vitamins and you may not need more. If you take a lot of b vitamins, you may have some discoloration (yellow or orange) of your urine.
Dr. Bennett Werner
Cardiology 45 years experience
No: Niacin (vitamin b3) is classified with a "c" rating for pregnancy (a being the safest) because there has been fetal harm in animal studies. There is insufficient data in humans but you should avoid supplementation. You should be taking prenatal vitamins which contain a safe amount of Niacin and plenty of folic acid.
Last updated Nov 28, 2017

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