Fish Oil and Omega-3 Supplements

What kinds of Omega-3 supplements are there?

Omega-3 supplements are usually classified by their source – fish oil, krill oil, and plant-based (algae).

Fish oil remains the primary choice due to its wide availability and the option to choose different concentrations. Krill oil is often preferred for its convenience of use and specific omega-3 form, while plant-based options are relevant for vegetarians or vegans.

When choosing, it's important to understand that different sources mean not only different origins but also different forms and concentrations of omega-3.

What is the difference between fish oil and krill oil?

The main difference is the form of omega-3 and how the body recognizes them.

In fish oil, omega-3s are usually in triglyceride form, while in krill oil, they are in phospholipid form. Phospholipids are closer to the natural structure of human cells, so krill oil is often associated with more efficient absorption and easier use.

Krill oil also naturally contains astaxanthin, which helps protect fatty acids from oxidation.

Meanwhile, fish oil usually has a higher concentration of EPA and DHA per serving, making it easier to reach the required daily amount.

In short: krill – convenience and form, fish oil – concentration and dose flexibility.

Read more about the differences: How to choose the best Omega-3 supplements

Which Omega-3 form to choose – capsules or liquid?

The choice usually depends not on "what's better," but on what you will actually use daily.

Capsules are more convenient – they are easy to dose, have no distinct taste, and are suitable for daily use. This is the most common choice for adults.

Liquid fish oil allows for easier dose adjustment and often has a higher concentration of omega-3 per serving. It is more often chosen for children or those who find it difficult to swallow capsules.

In practice, the most important thing is not the form, but consistent use – even the best supplement will not work if you don't use it regularly.

What to look for when choosing an Omega-3 supplement?

When choosing an omega-3 supplement, not only the name or the number of capsules matters, but also the actual composition.

EPA and DHA content: the most important thing is the amount of active ingredients per serving, not the total "mg of fish oil."

Source of raw materials: small fish (e.g., anchovies, sardines) or krill are often valued for their lower risk of contamination.

Form (triglycerides vs. phospholipids): different forms can affect absorption and user experience.

Quality and stability: it is important that the product is protected from oxidation and manufactured according to quality standards.

Convenience of use: capsule size, taste, or form often determines whether the supplement becomes part of a daily routine.

How to recognize a quality Omega-3 supplement?

The market offers a wide selection of Omega-3 supplements, so choosing truly high-quality ones can sometimes be difficult.

When choosing supplements, make sure they have a GMP (Good Manufacturing Practice) certificate. This proves that the food supplements are manufactured according to the highest quality standards.

Also, pay attention to the raw materials – from which sources the Omega-3 fatty acids are extracted. These can be krill, algae, seeds, and fish. They must be caught in clean waters.

Good quality food supplements should also be tested for possible contaminants (e.g., mercury, lead). This is very important because some fish accumulate heavy metals.

Also, carefully read the information leaflet of the purchased Omega-3 food supplements and learn how to store them properly to ensure they remain of impeccable quality and are maximally absorbed.

How much Omega-3 is needed per day?

The need for Omega-3 depends on age, diet, and individual goals. When evaluating supplements, the most important thing is to look at the total amount of EPA and DHA per day (the recommended dosage is indicated on each product package).

For children, fish oil doses are recommended according to their age, for example, 1-3 year olds need 100 mg per day, and older children, 7-12 year olds – 250 mg. For smaller children, it is more convenient to use Omega-3 supplements in liquid form or chewable forms.

For healthy adults, the minimum amount associated with maintaining normal bodily functions is 250 - 500 mg of EPA and DHA per day.
However, in practice, larger amounts are more often targeted – about 500–1000 mg per day, especially if fatty fish is consumed rarely.
In some cases, higher doses are also used (e.g., 1–2 g or more), but such amounts should be evaluated individually.

Elderly individuals require a higher than usual amount of Omega-3 fatty acids: 1-2 grams per day, as they are at a higher risk of cardiovascular diseases, inflammation, or brain diseases. It is advisable to take them at a convenient time and with food, especially healthy fats for better absorption.

For athletes, the recommended dose is 1-3 grams of Omega-3 fatty acids per day. It is most expedient to take them with food, after training.

Read more about doses and needs: The benefits of Omega-3 for the body: functions, effects, and recommended doses

When is it worth taking Omega-3 supplements?

Omega-3 supplements are usually chosen when there is an insufficient intake from food – for example, when fatty fish is rarely consumed.

They also often become part of the daily routine for people who want to maintain the overall balance of bodily functions.

It is important to understand that supplements complement the diet, but do not replace it.

If you suspect a deficiency: Signs of Omega-3 deficiency: how to tell if your body is lacking them

How to choose fish oil for children?

When choosing fish oil for children, it is important to consider not only the composition but also the convenience of use.

Liquid fish oil or gummies are most often chosen, and for older children – smaller capsules. If the supplement is not pleasant-tasting or convenient to use, it is often simply not used consistently.

It is also important to evaluate the amount of EPA and DHA and the composition – choose products with a clear composition, adapted to children's needs.