Data last updated: April 2026

Flaxseed vs Onion

Nutrition Comparison per 100g

Flaxseed 7
vs
3 Onion

Nuts & Seeds vs Vegetables

Side-by-Side Nutrition Facts

Nutrient Flaxseed Onion Better
Calories 534kcal 40kcal Onion
Protein 18.3g 1.1g Flaxseed
Total Fat 42.2g 0.1g Onion
Carbohydrates 28.9g 9.3g Flaxseed
Fiber 27.3g 1.7g Flaxseed
Sugar 1.6g 4.2g Flaxseed
Vitamin C 0.6mg 7.4mg Onion
Calcium 255mg 23mg Flaxseed
Iron 5.7mg 0.2mg Flaxseed
Potassium 813mg 146mg Flaxseed

Macronutrient Breakdown

Flaxseed

Protein: 18.3g Fat: 42.2g Carbs: 28.9g

Onion

Protein: 1.1g Fat: 0.1g Carbs: 9.3g

Data Source

Nutrition data sourced from the USDA FoodData Central SR Legacy database. All values are per 100g of the food item. Actual nutritional content may vary by preparation method, brand, and serving size.

Flaxseed vs Onion — Key Takeaway

Onion has 494 fewer calories per 100g than Flaxseed, making it the lighter option. For protein, Flaxseed leads with 18.3g per 100g. Flaxseed is the better source of fiber at 27.3g per 100g.

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