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  4. Frosted oat cereal with marshmallows

These oats have 400 kcal and 4.3 g fiber per 100 g. Oat soluble fiber is a soluble fiber that reduces LDL levels: a meta-analysis found 3+ g/day lowers LDL by 0.25 mmol/L (Ho et al., Am J Clin Nutr 2014). Cooking triples the weight, so 40 g dry becomes about 120 g cooked at ~55 kcal. Weigh dry for accuracy.

About this food

How should I track Frosted oat cereal with marshmallows?

Frosted oat cereal with marshmallows is high in iron. The key to tracking Frosted oat cereal with marshmallows 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: 7% Protein, 85% Carbs, 8% FatCarbs85%
Protein7%7.1g
Carbs85%84.7g
Fat8%3.3g

Nutrition Facts

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

Energy
  • Calories
    400kcal—
Macronutrients
  • Protein
    7.1g14%
  • Carbohydrates
    84.7g—
  • Fat
    3.3g—
  • Fiberathlete
    4.3g15%
  • Sugar
    36.1g—
  • Saturated Fat
    0.6g—
Minerals
  • Sodium
    533mg—
  • Calciumathlete
    333mg26%
  • Ironathlete
    15mg83%
Vitamins
  • Vitamin Dathlete
    3.6mcg18%

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

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Frosted oat cereal with marshmallows — values for 100g

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Primary macros

Calories
400
kcal
Protein
7.1
g
Carbs
84.7
g
Fat
3.3
g

More nutrients

Fiber
4.3g
Sugar
36.1g
Sat. Fat
0.6g
Sodium
533mg
Calcium
333mg
Iron
15mg
Potassium
207mg
Magnesium
28mg
Zinc
8mg
Vitamin D
3.6mcg
Nutrient highlights
High in IronHigh in ZincHigh in CalciumGood Source of Vitamin DGood Source of Fiber

Frequently Asked Questions

Frosted oat cereal with marshmallows is high in iron. The key to tracking Frosted oat cereal with marshmallows 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.

Frosted oat cereal with marshmallows contains 7.1g protein per 100g, which is lower in protein. A 100g serving provides 7.1g protein.

Notable nutrients in Frosted oat cereal with marshmallows include Iron, Zinc and Calcium. Per 100g: 7.1g protein, 84.7g carbs, and 3.3g fat.

Frosted oat cereal with marshmallows contains 400 kcal per 100g, making it more calorie-dense. For weight loss, control portion sizes and fit it within your daily calorie targets.

Frosted oat cereal with marshmallows is not ideal for a keto diet. At 80.4g net carbs per 100g, a single serving could easily exceed the daily 20-50g net carb limit.

Frosted oat cereal with marshmallows provides 400 kcal, 7.1g protein, 84.7g carbs, and 3.3g fat per 100g. Compare with other grains & cereals foods in our database to find the best option for your nutritional goals.

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Grains & Cereals

Frosted oat cereal with marshmallows

Macros per 100g

400
Calories
Protein7.1g
Fat3.3g
Carbs84.7g
Article research basis
1,316Papers Analyzed
4,659Foods in Database
100%Peer-Reviewed Sources
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Reviewed by Calibr8

Peer-reviewed data · Last updated March 15, 2026

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