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  1. Flax Seeds

Flaxseeds have 27.3 g fiber per 100 g – second only to chia among seeds. Whole flaxseeds pass through the gut largely undigested, so ground flaxseed delivers significantly more nutrients. A typical serving is 10–15 g (a tablespoon), adding 55–80 kcal. In Bulgaria, ground flax is commonly added to yogurt, porridge, and homemade bread.

About this food

How should I track Flax Seeds?

Flax Seeds is high in fiber. Nuts like Flax Seeds are one of the easiest foods to overeat. Research on portion estimation (Almiron-Roig et al., Appetite 2013) found that people underestimate calorie-dense foods by 50–200% when eyeballing portions. A small handful can easily be 300+ calories. The best habit: pre-portion into 30 g bags or use a scale each time. Also check whether your nuts are raw, roasted, or roasted-in-oil — the roasted-in-oil versions add extra fat that is not in the raw nutrition values.

Macro Breakdown

Macro Split: 13% Protein, 20% Carbs, 67% FatMacro Split100%
Protein13%18.0g
Carbs20%29.0g
Fat67%42.0g

Nutrition Facts

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

Energy
  • Calories
    534kcal—
Macronutrients
  • Protein
    18.0g36%
  • Carbohydrates
    29.0g—
  • Fat
    42.0g—
  • Fiberathlete
    27.0g96%
  • Sugar
    1.6g—
  • Saturated Fat
    3.7g—
Minerals
  • Sodium
    30mg—
  • Calciumathlete
    255mg20%
  • Ironathlete
    6mg32%
Vitamins
  • Vitamin Dathlete
    0.0mcg0%

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

Serving Calculator

Serving Calculator

Flax Seeds — values for 15g

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Primary macros

Calories
80
kcal
Protein
2.7
g
Carbs
4.3
g
Fat
6.3
g

More nutrients

Fiber
4.0g
Sugar
0.2g
Sat. Fat
0.6g
Sodium
5mg
Calcium
38mg
Iron
1mg
Potassium
122mg
Magnesium
59mg
Zinc
1mg
Vitamin D
0.0mcg
Nutrient highlights
High in FiberHigh in MagnesiumHigh in ZincHigh in IronGood Source of CalciumGood Source of ProteinGood Source of Potassium

Frequently Asked Questions

Flax Seeds is high in fiber. Nuts like Flax Seeds are one of the easiest foods to overeat. Research on portion estimation (Almiron-Roig et al., Appetite 2013) found that people underestimate calorie-dense foods by 50–200% when eyeballing portions. A small handful can easily be 300+ calories. The best habit: pre-portion into 30 g bags or use a scale each time. Also check whether your nuts are raw, roasted, or roasted-in-oil — the roasted-in-oil versions add extra fat that is not in the raw nutrition values.

Flax Seeds contains 18g protein per 100g, which is a good source of protein. A 15g serving provides 2.7g protein.

Notable nutrients in Flax Seeds include Fiber, Magnesium and Zinc. Per 100g: 18g protein, 29g carbs, and 42g fat.

Flax Seeds contains 534 kcal per 100g, making it more calorie-dense. For weight loss, control portion sizes and fit it within your daily calorie targets.

Yes, Flax Seeds is keto-friendly. With 29g total carbs and 27g fiber per 100g (2.0g net carbs), it fits easily within the daily 20-50g net carb limit.

Flax Seeds provides 534 kcal, 18g protein, 29g carbs, and 42g fat per 100g. Compare with other nuts & seeds foods in our database to find the best option for your nutritional goals.

Track this food

15g(Standard)
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322 kcal16.0g protein

Evidence-based. Peer-reviewed. Adapted to you.

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Portion errors reach 50–200% for dense foods. Calibr8 uses verified data and adapts from real results.

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Nuts & Seeds

Flax Seeds

Macros per 100g

534
Calories
Protein18.0g
Fat42.0g
Carbs29.0g
Article research basis
1,316Papers Analyzed
4,705Foods in Database
100%Peer-Reviewed Sources
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Reviewed by Calibr8

Peer-reviewed data · Last updated March 26, 2026

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Potassium
813mg17%
  • Magnesiumathlete
    392mg93%
  • Zincathlete
    4mg39%
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