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  1. Post, Grape-Nuts Flakes

Grape-Nuts Flakes has 376 kcal per 100 g with 10.2 g fiber. A standard cereal serving is 30–40 g, though most people pour 50–80 g. Weigh your usual pour once to know the real portion size. Higher whole grain intake is linked to reduced mortality (Reynolds et al., Lancet 2019).

About this food

How should I track Post, Grape-Nuts Flakes?

Post, Grape-Nuts Flakes is high in iron. The key to tracking Post, Grape-Nuts Flakes is knowing whether you are logging dry or cooked weight. Grains absorb 2–3 times their weight in water during cooking, so 80 g of dry rice becomes about 200 g cooked. Mixing up dry and cooked values can throw your calorie count off by 200–300%. A meta-analysis (Reynolds et al., Lancet 2019) linked higher whole grain intake to reduced mortality — but only accurate tracking captures the real intake. Weigh on a kitchen scale before cooking and use the matching nutrition values.

Macro Breakdown

Macro Split: 9% Protein, 82% Carbs, 9% FatMacro Split100%
Protein9%9.4g
Carbs82%82.0g
Fat9%3.7g

Nutrition Facts

Per 100g. Percentages reflect Daily Value (DV).

Energy
  • Calories
    376kcal—
Macronutrients
  • Protein
    9.4g19%
  • Carbohydrates
    82.0g—
  • Fat
    3.7g—
  • Fiberathlete
    10.2g36%
  • Sugar
    15.2g—
  • Saturated Fat
    0.5g—
Minerals
  • Sodium
    470mg—
  • Calciumathlete
    36mg3%
  • Ironathlete
    28mg155%
Vitamins
  • Vitamin Dathlete
    3.4mcg17%

% Daily Value based on FDA 2,000 kcal reference diet. Strength trainees have different needs — see highlighted nutrients.

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Post, Grape-Nuts Flakes — values for 100g

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Primary macros

Calories
376
kcal
Protein
9.4
g
Carbs
82.0
g
Fat
3.7
g

More nutrients

Fiber
10.2g
Sugar
15.2g
Sat. Fat
0.5g
Sodium
470mg
Calcium
36mg
Iron
28mg
Potassium
336mg
Magnesium
101mg
Zinc
8mg
Vitamin D
3.4mcg
Nutrient highlights
High in IronHigh in ZincHigh in FiberHigh in MagnesiumGood Source of Vitamin D

Frequently Asked Questions

Post, Grape-Nuts Flakes is high in iron. The key to tracking Post, Grape-Nuts Flakes is knowing whether you are logging dry or cooked weight. Grains absorb 2–3 times their weight in water during cooking, so 80 g of dry rice becomes about 200 g cooked. Mixing up dry and cooked values can throw your calorie count off by 200–300%. A meta-analysis (Reynolds et al., Lancet 2019) linked higher whole grain intake to reduced mortality — but only accurate tracking captures the real intake. Weigh on a kitchen scale before cooking and use the matching nutrition values.

Post, Grape-Nuts Flakes contains 9.4g protein per 100g, which is lower in protein. A 100g serving provides 9.4g protein.

Notable nutrients in Post, Grape-Nuts Flakes include Iron, Zinc and Fiber. Per 100g: 9.4g protein, 82g carbs, and 3.7g fat.

Post, Grape-Nuts Flakes contains 376 kcal per 100g, making it more calorie-dense. For weight loss, control portion sizes and fit it within your daily calorie targets.

Post, Grape-Nuts Flakes is not ideal for a keto diet. At 71.8g net carbs per 100g, a single serving could easily exceed the daily 20-50g net carb limit.

Post, Grape-Nuts Flakes provides 376 kcal, 9.4g protein, 82g carbs, and 3.7g fat per 100g. Compare with other grains & cereals foods in our database to find the best option for your nutritional goals.

Track this food

100g(Standard)
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Grains & Cereals

Post, Grape-Nuts Flakes

Macros per 100g

376
Calories
Protein9.4g
Fat3.7g
Carbs82.0g
Article research basis
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4,705Foods in Database
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Reviewed by Calibr8

Peer-reviewed data · Last updated March 26, 2026

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Potassium
336mg7%
  • Magnesiumathlete
    101mg24%
  • Zincathlete
    8mg71%
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