Answer:

Titanium dioxide is an FDA approved food coloring agent commonly added to pills to make them white. Although only very small amounts are used in supplements (less than 1% of the formulation) animal studies have raised concerns that it could be carcinogenic and adversely affect the digestive tract. For more information about this, plus other ingredients used to color or improve the texture, taste or freshness of pills, see the Review article about Inactive Ingredients/Excipients in Supplements.

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1 Comments

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Leland17850
May 15, 2019

Have you seen this study from the University of Sydney? Might it affect your position on the safety of titanium dioxide?

"Common food additive found to affect gut microbiota
Titanium dioxide nanoparticles E171 may impact human health"

https://www.sciencedaily.com/releases/2019/05/190513123017.htm

ConsumerLab.com
June 12, 2019

Hi Leland - We've added information about this study to the Review article about Inactive Ingredients/Excipients: https://www.consumerlab.com/reviews/Inactive_Ingredients_in_Supplements/inactiveingredients/#titaniumdioxide.

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