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Multivitamins Causing Nausea -- woman with nausea holding multivitamin


A variety of ingredients in multivitamins may cause nausea, depending on the amount of each and your sensitivity. See the Avoiding nausea section of the Multivitamin/Multimineral Supplements Review for details and how to avoid these. Also see our Top Picks for multivitamins.

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December 30, 2015

All synthetic vitamins make me nauseous I have no problems with high quality whole food vitamins like MegaFood's brand.

Helen 8243
January 1, 2016

I have the same problem ,just the smell of my multi vitamin makes me think twice, its Intergrative Therapeutics Clinical Nutrients 45-plus Women. I do take them with food. Perhaps it is the Vitamin B that is the culprit

December 21, 2015

My mult-vitamin began to make me nauseous when beta-carotene was added as an improvement. Not an improvement for me! I switched brands to one without this ingredient.

May 13, 2015

Always take with food.

May 13, 2015

I had a problem like that all my life until recently. My experience and solution may or may not be analogous to yours.
A couple of years ago my doctor, an integrative medicine specialist (an M.D. in Washington, D.C.) had me get genetic testing through 23andme. Among other things, it showed that, like a significant percentage of people, I have problems processing folic acid (a B vitamin.) He has me take a B-vitamin complex that has methylfolate, which my body can process. So I don't take a multivitamin, I take separate supplements and no longer feel nausea from the B vitamins. (By the way, those of us who struggle with regular folic acid have had it worse since 1995/98 when the FDA began requiring breads, cereals and other wheat-sourced food to be fortified with folic acid to thwart spina bifida. It worked for the spina bifida, but not for me.
Research: "folic acid" and "methylated folate."

January 1, 2017

Terry1712, I have issues with nausea as well and suspect my B complex. I do take with a fair amount of food which usually does it. But more and more I feel queasy just thinking about taking my vitamins! I take the Thorne Basice B-complex capsules (Methylated). It uses L-5 Methytetrahydrofolate (from L-5 Methyltetrahydrofolic Acid). I am presuming this is the same formulary as the Methylfolate your doctor prescribed to you?

This supplement has raised % of RDA for B vitamins, the highest being the B12 which is 6667%, and the Thiamine which is 7333%. The Folate is 100%. I was tested a few years ago for vitamin deficiencies and the Bs were the ones I was most deficient in. But I am thinking this strength is too high for me.

I also did a 23andme test but am not seeing any report about folate or folic acid. I think after saying all this, I should try a less-potent formula.

May 13, 2015

I found that the principle ingredient causing nausea in multivitamins is the mineral copper. Make sure the amount of copper is less than 1 mg per serving.

December 17, 2020

Thank you! This is what happens to me.


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