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Sugar, starch or fiber: which type of carbohydrate does NOT raise blood sugar?

Fiber, the part of plants your body doesn't digest.

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  1. Fiber ✔
  2. Starch
  3. Sugar

Why: CDC says sugars and starches raise your blood sugar, but fiber doesn't. Fiber is the part of plant foods that isn't digested, and it helps you stay healthy.

Huh, didn't know that: Harvard says soluble fiber forms a gel in the gut that can slow digestion and help prevent blood glucose surges.

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References

Answer: Fiber. CDC says sugars and starches raise your blood sugar, but fiber doesn't. Fiber is the part of plant foods that isn't digested, and it helps you stay healthy.

  1. Carb Counting to Manage Blood Sugar (CDC) www.cdc.gov/diabetes/healthy-eating/carb-counting-manage-blood-sugar.html
    Sugars and starches raise your blood sugar, but fiber doesn't.
    Checked 2026-10-08.
  2. Fiber (Harvard T.H. Chan School of Public Health) nutritionsource.hsph.harvard.edu/carbohydrates/fiber
    Soluble fiber attracts water in the gut, forming a gel, which can slow digestion. This may help prevent blood glucose surges after eating
    Checked 2026-10-08.

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