Written by CalorieData Nutrition TeamReviewed by a Registered DietitianLast Updated: March 2026

Flaxseed vs Oatmeal: Nutrition Comparison

Which is healthier? Compare calories, protein, carbs, and more

Complete side-by-side nutrition comparison per 100g serving | Updated 2026

Which is Healthier?

Oatmeal is generally healthier

Oatmeal comes out ahead in this comparison, winning in 3 out of 5 key nutritional categories. It has fewer calories (389 vs 534), less sugar (0g vs 1.6g), less sodium (2mg vs 30mg)making it the better choice for most health goals.

Quick Summary

Fewer Calories

Oatmeal

389 kcal

More Protein

Flaxseed

18g

More Fiber

Flaxseed

27g

Less Sugar

Oatmeal

0g

Visual Comparison

Caloriesper 100g
Flaxseed
534
Oatmeal
389
Proteinper 100g
Flaxseed
18g
Oatmeal
17g
Carbohydratesper 100g
Flaxseed
29g
Oatmeal
66g
Fatper 100g
Flaxseed
42g
Oatmeal
7g

Side-by-Side Nutrition Table

NutrientFlaxseedOatmealDifference
Calories534kcal389kcal+145.0kcal
Protein18g17g+1.0g
Carbohydrates29g66g-37.0g
Fat42g7g+35.0g
Fiber27g11g+16.0g
Sugar1.6g0g+1.6g
Sodium30mg2mg+28.0mg

Serving Size Comparison

All values above are per 100g. Here's how they compare in common serving sizes:

Flaxseed

Per 100g:534 calories
Per cup (150g):801 calories
Per serving (85g):454 calories

Oatmeal

Per 100g:389 calories
Per cup (150g):584 calories
Per serving (85g):331 calories

Diet Compatibility

Flaxseed

High-ProteinVeganVegetarianPaleoLow-Sodium

Oatmeal

High-ProteinVeganVegetarianLow-Sodium

When to Choose Flaxseed

  • Higher in protein (18g vs 17g)
  • More fiber (27g vs 11g)
  • Lower in carbs (29g vs 66g)

Common Uses

SnackingToppingsTrail mixBaking
View full Flaxseed nutrition →

When to Choose Oatmeal

  • Lower in calories (389 vs 534)
  • Less sugar (0g vs 1.6g)
  • Lower sodium (2mg vs 30mg)

Common Uses

Side dishesBreakfastMeal baseEnergy food
View full Oatmeal nutrition →

Flaxseed vs Oatmeal: Nutritional Analysis

Flaxseed is more calorie-dense at 534 calories per 100g compared to 389 for Oatmeal, a difference of 145 calories. On the protein front, Flaxseed delivers more with 18g per 100g versus 17g, which matters for muscle maintenance, satiety, and overall metabolic health. These differences become meaningful when you consider how each food fits into your daily dietary pattern rather than looking at any single nutrient in isolation.

Macronutrient Breakdown

The macronutrient profiles of Flaxseed and Oatmeal tell different nutritional stories. Flaxseed provides 29g of carbohydrates, 42g of fat, and 27g of fiber per 100g, while Oatmeal contains 66g carbs, 7g fat, and 11g fiber. The higher fiber content in Flaxseed supports digestive health, helps regulate blood sugar after meals, and contributes to longer-lasting satiety. Sugar content also differs: Flaxseed contains 1.6g while Oatmeal has 0g per 100g. Lower sugar options are generally preferable for blood sugar management and dental health.

Key Takeaways

  • For weight management: Oatmeal is the lower-calorie choice at 389 cal/100g, making it more suitable for calorie-controlled diets.
  • For muscle building: Flaxseed provides more protein (18g/100g), supporting muscle repair and growth.
  • For sustained energy: Flaxseed offers more fiber (27g/100g), which slows digestion and provides steadier energy release.
  • Overall: Neither food is universally "better" than the other. The right choice depends on your specific nutritional goals, meal context, and dietary preferences. Both can play a role in a balanced diet.

Frequently Asked Questions

Which has more calories, Flaxseed or Oatmeal?

Flaxseed has more calories with 534 kcal per 100g, compared to Oatmeal with 389 kcal. That's a difference of 145 calories per 100g serving.

Is Flaxseed healthier than Oatmeal?

Based on our nutritional analysis, Oatmeal is generally the healthier choice, winning in 3 out of 5 key nutritional categories. Oatmeal has 389 calories, 17g protein, and 11g fiber per 100g. However, the best choice depends on your specific dietary goals.

What is the protein difference between Flaxseed and Oatmeal?

Flaxseed has more protein with 18g per 100g, compared to Oatmeal with 17g. Flaxseed provides 1.0g more protein per 100g serving.

Which is better for weight loss, Flaxseed or Oatmeal?

For weight loss, Oatmeal is the better choice with only 389 calories per 100g compared to 534 calories in Flaxseed. Flaxseed also offers 27g of fiber per 100g, which helps you feel fuller longer.

Does Flaxseed or Oatmeal have fewer carbs?

Flaxseed has fewer carbs with 29g per 100g, compared to Oatmeal with 66g. If you're following a low-carb diet, Flaxseed is the better option with 37.0g fewer carbohydrates.

About Our Data

All nutrition data in this comparison is sourced from the USDA FoodData Central, the official food composition database maintained by the U.S. Department of Agriculture. Values are based on 100g servings for accurate comparison.

Health Disclaimer: This comparison is for informational purposes only and is not intended as medical or dietary advice. Nutritional needs vary by individual. The best food choice depends on your personal health goals, dietary requirements, and preferences. Consult a healthcare provider or registered dietitian for personalized nutrition guidance.