Is Cornstarch Keto?

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Cornstarch sticker illustration
KETO VERDICTNO

Cornstarch is not keto-friendly. With ~91g net carbs per 100g, it's almost pure starch with no redeeming nutritional value for keto. Even 1 tablespoon (8g) provides 7g net carbs. Use keto-friendly thickeners like xanthan gum or glucomannan instead.

Cornstarch is not keto-friendly. With ~91g net carbs per 100g, it's almost pure starch with no redeeming nutritional value for keto. Even 1 tablespoon (8g) provides 7g net carbs. Use keto-friendly thickeners like xanthan gum or glucomannan instead.

  • Net carbs (100g)91g
  • Protein (100g)0.3g
  • Fat (100g)0.1g
  • Keto verdictNot keto

NUTRITION FACTS

Per 100g (raw)

Net Carbs
91g
Total Carbs
91.3g
Fiber
0.9g
Protein
0.3g
Fat
0.1g
Calories
381

Source: Nutritional databases and food labels

HEALTH BENEFITS

  • Provides texture and thickness in cooking (non-keto contexts)
  • Gluten-free thickening option for celiac disease
  • Shelf-stable and inexpensive
  • Flavorless—doesn't alter taste of dishes

PREPARATION SUGGESTIONS

NOT FOR KETO USE

Cornstarch is incompatible with ketogenic diets. Do not use in keto cooking or baking.

KETO ALTERNATIVE: XANTHAN GUM

Use 1/4–1/2 tsp xanthan gum per cup of liquid to thicken sauces, gravies, and soups with <1g net carbs.

KETO ALTERNATIVE: GLUCOMANNAN

Start with 1/8 tsp glucomannan powder per cup liquid; it's very powerful. Let sit to thicken fully.

KETO ALTERNATIVE: GUAR GUM

Similar to xanthan gum; use sparingly (1/4–1/2 tsp per cup) to thicken without carbs.

KETO ALTERNATIVE: REDUCTION

Simmer sauces longer to evaporate water and naturally thicken without any thickener.

KETO ALTERNATIVE: CREAM/CHEESE

Add heavy cream, cream cheese, or grated hard cheese to thicken and add richness.