Corn starch
What the research shows
Conflicting
studies in people disagree
What research says
Studies in people
-
Concern
Blood sugar and insulin3
Corn starch raised insulin and blood sugar like glucose did, and offered no edge before exercise.
-
Benefit
Blood health in children4
In 4-year-olds, milk-based cornstarch porridge with added iron raised hemoglobin and cut anemia.
How it’s made and used
-
Gut bacteria and digestion5
In lab studies, corn starch changed by enzymes fed gut bacteria differently, making different amounts of fatty acids.
The signal at the top counts the findings in people and in animal and lab studies. A concern in studies of people outranks animal and lab studies, and “No concerns” needs at least one finding in people. When most findings in people point one way, the page leans that way (“Mostly”), and every finding is still shown. Findings whose study type is not stated are shown but not counted. This page is a reference, not medical advice. It describes what regulators and published research say. Talk to a doctor or dietitian about your own diet.
References
- 1corn starch: ingredient taxonomy entry. Open Food Facts.
- 2Corn starch. Wikipedia. Accessed September 26, 2026. CC BY-SA 4.0.
- 3Guezennec CY, Satabin P, Duforez F, Merino D, Peronnet F, Koziet J. Oxidation of corn starch, glucose, and fructose ingested before exercise. Med Sci Sports Exerc. 1989;21(1):45-50. doi:10.1249/00005768-198902000-00009
- 4Arcanjo FP, Arcanjo CC, Arcanjo FC, Campos Lde A, Amancio OM, Braga JA. Milk-based cornstarch porridge fortified with iron is effective in reducing anemia: a randomized, double-blind, placebo-controlled trial. J Trop Pediatr. 2012;58(5):370-4. doi:10.1093/tropej/fms003
- 5Dura A, Rose DJ, Rosell CM. Enzymatic Modification of Corn Starch Influences Human Fecal Fermentation Profiles. J Agric Food Chem. 2017;65(23):4651-4657. doi:10.1021/acs.jafc.7b01634