Is Cornstarch Gluten Free?

Written by:

Obi Obadike

Obi Obadike

Celebrity Fitness & Nutrition Expert, CFT, SFN, M.S. Founder & CEO – Ethical Inc.
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Is cornstarch gluten free? Most of the cornstarch that is out there is gluten free. It is known as a thickening agent that is used in dressings, soups, marinades, etc. Pure corn starch which is 100% corn starch is naturally gluten free.

The only way that corn starch can be contaminated with gluten is if it is manufactured in a facility that manufactures gluten containing foods.  And if that is the case there could be traces of cross contamination but that doesn’t happen often.

Is cornstarch gluten free? Photo credit: iStock-minadezhda

The best way to check if your corn starch is gluten free is to check the label for that appropriate certification. To receive a gluten free label certification a food must be tested and confirmed with fewer than 20 parts per million of gluten. A small amount of gluten will most likely not trigger any symptoms with people that have celiac disease.

A gluten free seal means that it has been independently tested by a 3rd party such as an NSF international organization.

Here are some other suitable substitutes to cornstarch which is:

  • Guar gum- It is low in calories and high in fiber which is a good weight loss food.
  • Flaxseed gel
  • Xanthan gum
  • Rice Flour
  • Potato starch
  • Tapioca starch
  • Arrowroot powder

The Bottom Line is cornstarch is naturally gluten free. The only way that corn starch could contain gluten is if it manufactured in a facility that makes gluten containing products.  And with this is the possibility of cross contamination because of the proximity of gluten containing products.

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  1. SCS- Global Services-
  2. NSF-
  3. U.S Food & Drug Administration-
  4. Thombare N, Jha U, Mishra S, Siddiqui MZ. Guar gum as a promising starting material for diverse applications: A review. Int J Biol Macromol. 2016 Jul;88:361-72. doi: 10.1016/j.ijbiomac.2016.04.001. Epub 2016 Apr 1. PMID: 27044346.
  5. Daly J, Tomlin J, Read NW. The effect of feeding xanthan gum on colonic function in man: correlation with in vitro determinants of bacterial breakdown. Br J Nutr. 1993 May;69(3):897-902. doi: 10.1079/bjn19930089. PMID: 8329363.
  6. Jyothi AN, Sheriff JT, Sajeev MS. Physical and functional properties of arrowroot starch extrudates. J Food Sci. 2009 Mar;74(2):E97-104. doi: 10.1111/j.1750-3841.2008.01038.x. PMID: 19323747.

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