FoodScore
0/ 100
Poornut seed· 100 g

Flaxseed Oil

Flaxseed oil scores 43/100 (Poor) primarily due to its high fat content, including 9.05g of saturated fat per 100g, despite being an excellent source of omega-3 fatty acids.

  • Flaxseed oil is a minimally processed (NOVA 1) food, meaning it retains most of its natural integrity.
  • A 100g serving provides an impressive 48.93g of omega-3 fatty acids, a key beneficial fat.
  • It contains 9.05g of saturated fat per 100g, contributing to its lower FoodScore of 43/100.
  • This oil is virtually free of protein and fiber, with 0g of each per 100g.
  • With 878 calories per 100g, flaxseed oil is very calorie-dense and should be consumed in moderation.
  • Scores -26 points above the nut seed category average (69/100 across 30 foods).
Fiber
0g
0% of Daily Value
Protein
0.37g
1% of Daily Value
Added sugar
0g
0% of Daily Value
Sodium
6mg
0% of Daily Value
+
What it brings to the table
Omega-3 (48.9g)+5
Healthy fat profile+10
Whole food (NOVA 1)+10
−
What holds it back
Saturated fat (9.1g)-12
Trans fat present-20

Why it scores 43

Flaxseed oil receives a FoodScore of 43/100, categorized as 'Poor,' primarily due to its nutrient density profile. While it is a minimally processed food (NOVA 1), earning a +10 bonus, and boasts a significant amount of omega-3 fatty acids (48.93g per 100g), which adds another +5 bonus, these positives are largely offset by its fat composition. The oil's healthy fat profile overall contributes a +10 bonus, recognizing its high unsaturated fat content. However, the presence of 9.05g of saturated fat per 100g incurs a substantial -12 penalty, aligning with dietary guidelines to limit intake of this fat type. Furthermore, the detection of trans fat, even in small amounts (0.18g), results in a significant -20 penalty, reflecting the strong recommendation to avoid trans fats. The absence of fiber, protein, and most micronutrients means it doesn't gain points in those categories. To achieve a higher score, flaxseed oil would need to have a lower saturated fat content and be entirely free of trans fats.

Health benefits

What the nutrients in flaxseed oil actually do for you, grounded in established dietary science.

Supports Heart Health

Flaxseed oil is highly regarded for its potential to support heart health, primarily due to its exceptional content of omega-3 fatty acids. A 100g serving provides 48.93g of omega-3s, which are essential polyunsaturated fats that research supports for their role in maintaining cardiovascular function. These fats can contribute to a healthy lipid profile and support overall heart well-being. While it does contain some saturated fat, the high omega-3 content is a significant positive for heart health, especially when replacing sources of less healthy fats in the diet.

Provides Essential Fatty Acids

Flaxseed oil is an excellent source of essential fatty acids, particularly alpha-linolenic acid (ALA), a type of omega-3. Since the human body cannot produce ALA, it must be obtained through diet. A 100g serving delivers nearly 49g of omega-3s, making it one of the richest plant-based sources. These fatty acids are crucial for various bodily functions, including cell membrane integrity and hormone production. Incorporating flaxseed oil can help ensure adequate intake of these vital nutrients, which are often lacking in typical Western diets.

Contributes to Brain and Mood Health

The high concentration of omega-3 fatty acids in flaxseed oil can contribute to brain and mood health. Omega-3s, particularly ALA, are precursors to other omega-3s like EPA and DHA, which are vital components of brain cell membranes and play a role in neuronal function. Research suggests that adequate intake of omega-3s is associated with supporting cognitive function and may help in maintaining a balanced mood. While flaxseed oil provides ALA, the body's conversion to EPA and DHA can vary, so it's a valuable part of a diet rich in diverse healthy fats.

A Minimally Processed Fat Source

As a NOVA class 1 food, flaxseed oil is considered minimally processed, meaning it undergoes little to no alteration from its natural state, beyond pressing and filtering. This classification indicates that the oil retains more of its inherent nutritional properties compared to highly refined oils. Choosing minimally processed foods like flaxseed oil aligns with dietary recommendations for a whole-food-focused diet. This can be beneficial for overall health by reducing exposure to additives and preserving the natural integrity of the food's components.

How to eat it

Flaxseed oil is a versatile oil typically used in cold applications due to its delicate nature and low smoke point. It has a mild, slightly nutty flavor that can complement a variety of dishes. It's not suitable for high-heat cooking but excels as a finishing oil or ingredient in dressings and smoothies. Given its calorie density (878 calories per 100g), it's best consumed in small, measured portions.

Always store flaxseed oil in the refrigerator in an opaque bottle to protect it from light and heat, which can cause oxidation and spoilage.
Use flaxseed oil in salad dressings, mixed into yogurt or oatmeal, or blended into smoothies to easily incorporate its omega-3 benefits into your diet.
Avoid using flaxseed oil for cooking, frying, or baking, as high heat destroys its beneficial omega-3s and can produce harmful compounds.
Start with a small amount, such as 1-2 tablespoons per day, to assess tolerance and gradually increase if desired, keeping its high calorie count in mind.
Things to keep in mind

Flaxseed oil is generally safe for most adults when consumed in typical dietary amounts. However, some individuals may experience mild gastrointestinal discomfort, such as bloating or diarrhea, especially when first introducing it into their diet or consuming large quantities. It's important to note that flaxseed oil, unlike whole flaxseeds, does not contain fiber, so it won't have the same laxative effect. People taking blood-thinning medications should consult a healthcare professional, as the high omega-3 content could potentially interact with anticoagulant drugs. There are no widely documented common allergies to flaxseed oil itself, but individuals with seed allergies should exercise caution.

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Reader questions
Is flaxseed oil healthy?
Flaxseed oil is considered healthy primarily due to its exceptionally high content of omega-3 fatty acids, with 48.93g per 100g. These essential fats are beneficial for heart and brain health. However, it also contains 9.05g of saturated fat and is very calorie-dense (878 calories per 100g), which contributes to its 'Poor' FoodScore of 43/100. It's best consumed in moderation as part of a balanced diet.
Is flaxseed oil good for heart health?
Yes, flaxseed oil is often recommended for heart health because it is one of the richest plant-based sources of alpha-linolenic acid (ALA), an omega-3 fatty acid. A 100g serving provides nearly 49g of omega-3s, which are known to support cardiovascular function. While it does contain some saturated fat, the overall fatty acid profile with high omega-3s is considered beneficial for heart health when used appropriately.
Is flaxseed oil processed?
Flaxseed oil is classified as a NOVA class 1 food, meaning it is unprocessed or minimally processed. This indicates that it undergoes minimal alteration from its natural state, typically involving pressing and filtering. This minimal processing helps to preserve the oil's natural nutrients and beneficial compounds, making it a whole-food-derived fat source.
How should I store flaxseed oil?
To maintain its quality and prevent oxidation, flaxseed oil should always be stored in the refrigerator in a dark, airtight container. Exposure to light, heat, and air can degrade its delicate omega-3 fatty acids, leading to a rancid taste and reduced nutritional benefits. Proper storage ensures the oil remains fresh and potent for longer.
What can I use instead of flaxseed oil?
If you're looking for an alternative with a similar omega-3 profile, chia seed oil is a good option, also rich in ALA. For other healthy fats, extra virgin olive oil or avocado oil can be used in cold applications, though they offer different fatty acid compositions. For cooking, consider oils with higher smoke points like avocado oil or refined olive oil, as flaxseed oil is not suitable for heat.
Does flaxseed oil help with weight loss?
Flaxseed oil is very calorie-dense, with 878 calories per 100g, so it's not a direct aid for weight loss. While healthy fats are important for satiety, consuming too much can easily lead to excess calorie intake. It's best to use flaxseed oil in small, controlled portions as part of a balanced diet, rather than relying on it for weight management. Whole flaxseeds, which contain fiber, might offer more satiety benefits.
Can I cook with flaxseed oil?
No, it is generally not recommended to cook with flaxseed oil. It has a very low smoke point and its delicate omega-3 fatty acids are susceptible to degradation when exposed to high heat. Cooking with flaxseed oil can destroy its beneficial compounds and may produce undesirable flavors or potentially harmful byproducts. It is best reserved for cold applications like dressings, smoothies, or drizzling over finished dishes.

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Data & references

Sources: USDA FoodData Central (SR Legacy, fdcId 171442)Updated 2026-04-20