Cornflakes is generally unsuitable for keto at typical portions. The reference amount contains 85.3g net carbs; a normal serving can consume much of a strict daily carbohydrate limit.
Are Cornflakes Keto?

YOUR PORTION
How much are you having?
Scale the published reference values to your portion.
Per 100 g (as listed by source). Curated estimate; estimated values.
How this is calculated
total carbohydrate - fiber. Each published value is multiplied by your portion divided by the reference amount. No extra fiber, sugar alcohol or allulose deductions are applied here.
Grams and milliliters are not interchangeable. Household measures require a food-specific conversion; check your scale or product label.
85.3gnet carbs in your portion
- Total carbs
- 88g
- Fiber
- 2.7g
- Protein
- 8g
- Fat
- 1g
- Calories
- 380
Cornflakes is generally unsuitable for keto at typical portions. The reference amount contains 85.3g net carbs; a normal serving can consume much of a strict daily carbohydrate limit.
- Net carbs (100 g)85.3g
- Protein (100 g)8g
- Fat (100 g)1g
- Keto verdictAvoid on keto
NUTRITION FACTS
Per 100 g (as listed by source)
Source: Curated estimate
Source fit: curated estimate; not an exact source match
Net-carb calculation: total carbohydrate - fiber
A USDA reference record exists, but the displayed basis or macros do not directly reproduce it, so KetoLens does not attribute these values to USDA. Check the current label for packaged products.
Nutrition record reviewed 2026-07-09. Maintained by KetoLens Team.
WHY IT'S NOT KETO-FRIENDLY
- Not suitable for keto: very high net carbs per 100g and per serving
- This item contains the nutrients or compounds listed above; evidence for specific health outcomes depends on dose, preparation, and individual context.
- Typical serving (30g) already ~25g net carbs—exceeds daily keto limit
- Low fat and modest protein give a poor keto macro profile
- Fortified vitamins don’t offset the carb load
- Better replaced with low-carb ‘cereal’ options (nuts/seeds mixes)
PREPARATION SUGGESTIONS
AVOID COMPLETELY
Cornflakes do not fit keto. Skip entirely to maintain ketosis.
KETO CEREAL ALTERNATIVE
Use a low-carb keto cereal (1–2g net carbs/serving) with unsweetened nut milk.
NUTS AND SEEDS MIX
Toast almonds, pecans, and chia with butter and a non-nutritive sweetener for crunch.
EGGS FOR BREAKFAST
Choose eggs with cheese, avocado, and bacon for a satiating keto start.