Soluble Corn Fiber

Last reviewed October 19, 2026

In plain words: Soluble corn fiber is a fiber made from corn starch, used to cut sugar and add fiber. It is also called resistant maltodextrin.

What the evidence review says

Soluble corn fiber is a fiber made from corn starch, used to cut sugar and add fiber. No toxicity was found at food uses. Like other fermentable fibers, large or sudden amounts are linked with gas and softer stools.

No toxicity finding at food uses was located. Like other fermentable fibers, large or sudden doses can cause gas, softer stools, and abdominal discomfort. A dose-response review of trials described good tolerance near 12 g/day, mild to moderate symptoms at about 12-27 g/day, and more flatulence and mild pain above about 50 g/day. Human trials also report higher calcium absorption in adolescents at about 10-20 g/day. The practical issue for a scanner is not to confuse it with digestible maltodextrin or with IMO.

• Source: Whisner CM et al., J Nutr, 2016 · doi:10.3945/jn.115.227256
• Source: Whisner CM et al., Br J Nutr, 2014 · doi:10.1017/s0007114514000981

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This page is for general education. It is not medical advice and does not replace advice from your doctor, pediatrician, allergist or registered dietitian. Research changes; we review these pages when new evidence or rules come out. Last reviewed October 19, 2026.