The carbohydrate your body can't digest; it slows how fast glucose enters your blood.
Fiber is the part of plant carbohydrate that passes through largely undigested. Soluble fiber in particular slows stomach emptying and the absorption of sugars, blunting the post-meal rise.
It's a big reason whole foods sit lower on the glycemic index than their processed or juiced versions: the fiber that came with them is doing real work.
General information, not medical advice. Browse the full glossary or the glycemic index of foods.
Learn what the reference numbers mean, then track your own logged readings and their share in your selected range. GMI and estimated A1C are withheld when source and coverage are unvalidated.
Educational content maintained by the SteadyRange. Source and terminology check: September 30, 2026. Independent clinical review is pending; no clinical reviewer credentials are claimed.