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The Complete Resistant Starch Guide: Cook, Cool, Reheat for Better Blood Sugar
By the GlycemicWise Data Editorial Team · Published 2026-09-03 · Last reviewed 2026-09-03 · Cooking Techniques · 6-8 min read · Dietary reference only
Resistant starch is a type of carbohydrate that resists digestion and acts like fiber. Learn which foods produce it and how to maximize the benefit.
What Is Resistant Starch?
Resistant starch escapes digestion in the small intestine, feeds gut bacteria, produces butyrate, and does not raise blood glucose. Type 3 is created by cooking and cooling starchy foods. Cooling increases resistant starch 2-3x and reduces effective glycemic index by 10-15%.
Which Foods Produce the Most?
Rice (long-grain, basmati, cool 12+ hours), potatoes (new/waxy varieties), pasta (al dente + cooling), legumes (naturally high), green bananas (Type 2 resistant starch, no cooking required).
GlycemicWise data perspective
In the GlycemicWise database, Rice white long-grain enriched carries a glycemic load of about 18 per 100g, rated Moderate GL. Of the 181 foods we track in the Cereal Grains and Pasta category, 3% are low-GL — context worth keeping when you build your plate.
Practical Protocol
Cook as usual. Spread in shallow container to cool quickly (safety: <2 hours at room temp). Refrigerate 12+ hours. Reheat gently. Consume within 3-4 days. Resistant starch survives reheating.
Dietary reference — not medical advice. Information provided for educational purposes.