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Omega 3: how to choose the right supplement or oil

Do you rarely eat sardines, mackerel or herring, but would like to increase your omega 3 intake? From fish oil capsules and krill oil to vegan formulas and “omega 3-6-9” blends, comparing products is not always as straightforward as it may seem. These products do not necessarily provide the same fatty acids.

Before buying an omega 3 food supplement, watch out for three common pitfalls:

  • Confusing the amount of oil with the actual amount of omega 3: a capsule containing 1,000 mg of fish oil does not necessarily provide 1,000 mg of EPA and DHA.
  • Relying on an overly general claim: statements relating to the heart, brain or vision must match authorised claims and the quantities specified on the label.
  • Overlooking the product format and dietary requirements: fish gelatin, shellfish, aftertaste, allergens or animal-derived ingredients may make a supplement incompatible with your lifestyle.

Criteria to check before choosing your omega 3

1. Look at EPA, DHA and ALA separately

The term “omega 3” covers several fatty acids. In fish oils, the two most sought-after are:

  • EPA, or eicosapentaenoic acid;
  • DHA, or docosahexaenoic acid.

Vegetable oils, such as rapeseed oil, mainly provide ALA, or alpha-linolenic acid. ALA is indeed an omega 3, but it cannot be directly compared with EPA and DHA in a nutritional table.

When comparing two supplements, check the amount of EPA and DHA provided by the daily dose, rather than looking only at the total weight of the oil. As a regulatory reference, the claim relating to the normal function of the heart is based on a daily intake of 250 mg of EPA and DHA, under the conditions laid down by regulations. This does not replace a varied diet or advice from a healthcare professional.

2. Check the dose and number of capsules

A concentrated formula can reduce the number of capsules you need to take each day. Conversely, a less concentrated oil may require several capsules to reach a comparable amount. Always check:

  • the dose recommended by the manufacturer;
  • the amount of EPA and DHA per dose;
  • the total number of doses available in the bottle;
  • the best-before date and storage conditions.

Omega 3 capsules are convenient for regular use, but some people prefer a liquid oil to add to meals. Taking it with a meal may also be more comfortable if you want to reduce reflux or the marine taste.

3. Check the source, allergens and storage

Fish oil contains fish, unsurprisingly, while the capsule may be made from gelatin. Krill oil contains shellfish and is therefore unsuitable for people with allergies. For an alternative free from fish and krill, choose a vegan formula made with algae oil.

Storage also plays an important role. Keep the bottle tightly closed and away from heat, light and moisture. For cooking oils, follow the instructions on the label and avoid leaving the bottle open near a heat source.

Which form of omega 3 should you choose for your needs?

Recommended for : Beginners on a budget
WEIGHTWORLD Omega-3 Fish Oil 1000mg, 400 Softgels

WEIGHTWORLD Omega-3 Fish Oil 1000mg, 400 Softgels

Why this product suits this profile : With one capsule recommended per day and a bottle containing 400 capsules, this formula is ideal for anyone who wants to get started simply, without having to restock too often.

How this product avoids the pitfall

The product information clearly distinguishes between 1,000 mg of fish oil and 300 mg of omega 3, including 180 mg of EPA and 120 mg of DHA. This means you can compare precise data, rather than relying solely on the total weight of the oil.

Main benefit and key features

400 capsules, 300 mg of omega 3 per capsule and a formula advertised as lactose- and gluten-free.

Recommended for : Premium supplement enthusiasts
Nutri&Co Omega 3 - 240 capsules

Nutri&Co Omega 3 - 240 capsules

Why this product suits this profile : This formula is designed for adults looking for a high concentration per dose and detailed information about its composition and traceability.

How this product avoids the pitfall

The product information lists the amount of fish oil, omega 3, EPA and DHA separately, while also specifying a maximum dose of three capsules per day.

Main benefit and key features

240 capsules, deodorised oil, vitamin E and fish gelatin capsules. Please note: this product is not vegan.

Recommended for : Specific uses and intensive users
WeightWorld Vegan Omega-3 2000mg 90 Softgels

WeightWorld Vegan Omega-3 2000mg 90 Softgels

Why this product suits this profile : Vegans and anyone avoiding seafood can choose this algae oil-based formula, with a recommended daily dose of two capsules.

How this product avoids the pitfall

The label specifies that this is algae oil and lists 600 mg of DHA and 300 mg of EPA per dose, rather than relying solely on the word “vegan”.

Main benefit and key features

A fish- and krill-free source, 90 capsules and a formula advertised as free from gluten and major allergens.

Recommended for : Everyday family cooking
LESIEUR Omega-3 Rich Rapeseed Oil 1 L

LESIEUR Omega-3 Rich Rapeseed Oil 1 L

Why this product suits this profile : Cooking oil is easy to include in dressings and some cooking methods, without adding another supplement to your routine.

How this product avoids the pitfall

The composition is clearly stated: 100% rapeseed oil. This is therefore not an omega 3-6-9 blend, whose proportions can sometimes be less transparent.

Main benefit and key features

A 1 L format, a stated French origin and versatile use both in dressings and cooking.

Looking for more options ?

We have brought together a complete, real-time updated selection of products that meet these selection criteria and European safety requirements.

Frequently asked questions about omega 3

Are omega 3 capsules essential if I eat fish?

Not necessarily. A varied diet can already provide omega 3, particularly through oily fish. However, a food supplement may be worth considering if these foods rarely feature on your menu. In that case, compare the amount of EPA and DHA with your usual diet and do not exceed the dose stated on the packaging.

What is the difference between fish oil, krill oil and algae oil?

Fish oil generally provides EPA and DHA, but contains fish, an allergen that must be taken into account. Krill oil is extracted from small shellfish, so it is unsuitable for people with shellfish allergies and vegans. Algae oil is a plant-based source of DHA and, depending on the formula, may also provide EPA. In all cases, check the product’s exact composition.

How long can an omega 3 supplement be stored?

Follow the date shown on the packaging and the storage conditions recommended by the manufacturer. Once opened, keep the bottle tightly closed and away from heat and light. An unusual smell or taste should prompt you not to consume the product. For children, the minimum age and dosage must be followed carefully; if in doubt, ask a healthcare professional for advice.