Linseed oil, fish oil or hemp seeds: The nutrient check for ALA, DHA and EPA

Why hemp oil and linseed oil Not (yet) are enough

Hemp oil, linseed oil and other plant-based sources of omega-3 contain plenty of alpha-linolenic acid (ALA), but did you know that the human body only converts about 5% of this ALA into the valuable omega-3 fatty acids EPA and around 0.5% into DHA?

This means that plant-based sources of omega-3 alone are rarely enough to meet your needs for EPA and DHA. So if you really want to benefit from omega-3, you can hardly avoid marine sources such as fish oil or algae oil.

Important tip:

You can find out what you should look for in the right oil at the end of the article.

Introduction: This is how important omega-3 fatty acids are

Did you know, that around 95% of Germans do not consume enough omega-3 fatty acids?

(How you can also tell if you have a deficiency, you can find out in this Article . But it's always best to get tested. Read more here .)

Yet these fatty acids are crucial for our cell membranes, nerve cells and heart health. But where do we get these valuable fatty acids best?

Omega-3 fatty acids are found in both plant and animal sources. Flaxseed and flaxseed oil are great sources of ALA, while fish oil is particularly rich in EPA and DHA. Hemp seeds also score with a balanced mixture of all three fatty acids.

Whether plant-based or animal-based – the right balance is crucial to avoid defects. Let yourself be inspired in the next sections on how to optimally design your diet.

An overview
  • Omega-3 fatty acids: essential for heart health and brain function
  • Flaxseed and linseed oil: rich in plant-based ALA
  • Hempseed: Hemp oil is a good source of ALA, but it is not a complete substitute for EPA and DHA.
  • Conversion of ALA: The body can theoretically convert ALA into EPA and DHA – but the conversion rate is very low
  • Fish oil and algae oil: directly supplies EPA and DHA

Why hemp oil & Co. are not like fish oil

Hemp oil, linseed oil and other plant sources bring valuable nutrients, but mainly contain ALA - and this is where the problem lies. The body is simply not very efficient at converting ALA into EPA and DHA. That's why marine omega-3 fatty acids (for example from fish oil or algae oil) are so important, because they bring EPA and DHA directly.

Important to know:

  • ALA is only converted to about 5% into EPA and about 0.5% into DHA.
  • Vegetable oils are therefore often only a beginning, but not a complete replacement for fish or algae oil.

And please consider: Never heat hemp and other vegetable oils to a high temperature! This produces trans fats, which can promote inflammation in the body.

Linseed oil, fish oil or hemp seeds? The big nutrient check

The Basics to ALA, EPA and DHA
  • ALA (alpha-linolenic acid) : abundant in plant sources such as linseed or hemp oil
  • EPA and DHA : found mainly in fatty fish or fish oil (e.g. mackerel, herring, sardines, salmon)

Only fish oil or algae oil provides these fatty acids directly. This makes a big difference to your health, because EPA and DHA are indispensable in many bodily functions.

Where does your omega-3 come from?
  • Linseed oil, flaxseed : High ALA content, but only low conversion rate to EPA/DHA
  • Fish oil : delivers EPA and DHA directly, without conversion loss
  • Hempseed : Balanced fatty acids, but still only suitable to a limited extent if the total requirement of EPA/DHA is high
Your optimal Omega-3 Mix

Even if you live plant-based, you can design your diet in such a way that you get as much omega-3 out of it as possible. Algae oil is considered an excellent vegan alternative to fish oil.

In any case, it's worth taking a closer look at your omega-6 to omega-3 ratio. Unfortunately, it is often well above the recommended 1:5, which promotes inflammation. However, this can be balanced out with a consciously chosen diet.

The role of ALA, EPA and DHA

Omega-3 fatty acids are essential building blocks for our cell membranes and perform important functions in our bodies – from heart health to brain development.

ALA:

Plant-based, can only be converted to EPA and DHA to a limited extent.

EPA:

Anti-inflammatory and relevant for cardiovascular functions.

DHA:

Especially important for the brain, eyes and nervous system.

So if you rely only on hemp or linseed oil, you may be wasting valuable potential for your health.

Plant vs. animal omega-3 sources What you need to know

Differences in origin and effect
  • Linseed oil : up to 60% ALA, sensitive to light and heat
  • Fish oil : Directly provides EPA and DHA, efficient source of omega-3
  • Hempseed : Nutty taste, contain ALA, but not EPA and DHA
Tips for choosing
  1. 1
    Look for high-quality oils (more on that at the end).
  2. 2
    Regularly rely on fatty sea fish or fish oil supplements (or algae oil as a vegan option).
  3. 3
    Combine different sources of omega-3 for a good balance.
Conversion processes in the body

The conversion rate of ALA to EPA is about 5%, in DHA only about 0.5%. High amounts of omega-6 (e.g. from sunflower oil) can make this conversion even more difficult.

Important:

  • Think about a good omega-3 to omega-6 ratio (1:3).
  • Too much omega-6 weakens the ALA conversion.

Quality of oils

Storage and processing
  • Linseed oil : sensitive to light and heat, ideal for cold dishes (dressings, smoothies).
  • Fish oil : often refined, pay attention to purity and origin (more on that later).
Hemp oil in cold kitchen
  • Great for salads, smoothies or cold sauces.
  • Hemp seeds are a tasty snack and a versatile source of protein and fiber.

Algae oil a plant-based alternative

Looking for a vegan option? Then algae oil can be a solution. It provides EPA and DHA directly from microalgae, without a detour via fish. Particularly interesting for vegans or vegetarians who still want enough omega-3.

Read the direct comparison of algae oil and fish oil here.

    Important:

    What you should look for in a good Omega product.


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    If you're serious about working on your omega-3 balance, Zinzino is an excellent choice to get into the optimal fatty acid balance in the long term.

    In short : Fish oil or Algae oil is not just a "nice extra", but often an essential step if you really want to get your omega-3 levels to healthy heights. Hemp oil and linseed oil are great additions, but they cannot completely replace fish oil (or algae oil). It's better to go for a mix – and opt for quality when it comes to your health.

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    20/08/2025

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