Omega-3 Fatty Acids

Advertisement - Scroll to continue

What are Omega-3 Fatty Acids?

Omega-3 fatty acids belong to the group of polyunsaturated fatty acids. It means that in one molecule of omega-3 fatty acid, the last double bond in the carbon chain is located on the third carbon atom from the end.

The compounds are not synthesized in the human body, but those supplied with food can undergo enzymatic transformations. During this process, physiological substances necessary for the proper functioning of the body are produced.

Omega-3 acids are compounds that are an essential element of everyday nutrition. A balanced and well-composed diet of a healthy person should meet their energy needs and contain all the ingredients necessary for the proper functioning of all organs, development, and health maintenance.

Omega-3 Fatty Acids: What Are, Health Benefits, and Daily Dose

Omega-6 and Omega-9 Acids

Omega-3 and omega-6 fatty acidsTrusted Source are classified as essential fatty acids (EFA). Human organisms cannot create these substances on their own. It is particularly significant to maintain their balance in the body. For this reason, it is recommended that the ratio of omega-6 to omega-3 fatty acids in the diet be a maximum of 4:1.

Omega-9 acidsTrusted Source, in turn, are monounsaturated acids, which means they have only one double bond. It is located on the ninth from the end omega carbon atom in the fatty acid molecule, hence the number in their name.

Types of Omega-3 Fatty Acids

There are different types of omega-3 fatty acids. They vary primarily in their chemical configuration and the natural origin from which they come. The most important of them include:

Health Benefits

Omega-3 acids have strong health-promoting propertiesTrusted Source and are therefore worth including in your daily diet. Experts explain that these compounds demonstrate:

Some studies have also shown the role of omega-3 fatty acids in the treatment of attention deficit hyperactivity disorder (ADHD). They also have an antidepressant effect and help reduce the incidence of chronic inflammatory diseases. However, these matters require further clinical investigation.

These compounds participate in the blood clotting process and have anti-inflammatory and antioxidant properties.

Omega-3 During Pregnancy

As mentioned earlier, the most popular compounds from the omega-3 group include alpha-linolenic acid (ALA) and long-chain acids: docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA). Two types in particular during pregnancyTrusted Source play an essential role in the development of the fetus and the health of the mother.

Future mothers should be aware that DHA is needed by the fetus not only in the mother’s womb but also when the child is growing and developing intensively. Initially, it is supplied through the placenta and later during breastfeedingTrusted Source with mother’s milk. This ingredient primarily determines the proper development of the child’s nervous system. For this reason, it is worth supplementing it, especially in the second and third trimester of pregnancy, when the fetal brain develops intensively. Additionally, DHA influences later mental development and motor and cognitive functions and reduces the risk of developing allergies in a child. A deficiency of this compound in a toddler’s diet may result in later problems with concentration and acquiring new skills.

Omega-3 Fatty Acids: What Are, Health Benefits, and Daily Dose

It is also worth knowing that DHA is an essential building block of the retina. It thus ensures the proper development of the child’s visual system. Its deficiency may cause vision disorders in children and also cause retinopathy of prematurity, which may even lead to complete loss of vision.

In addition to its beneficial effect on the child’s development, DHA is also necessary for the future mother’s body because it reduces, among other things, the risk of preeclampsia or postpartum depression.

Deficiency of Omega-3 Acids in the Body

The most common symptoms of omega-3 deficiency in the diet include:

There may be many causes of these symptoms, so it is worth first determining their cause and then effectively eliminating it. However, if further suspicions are ruled out, supplementation with omega-3 acids is worth it.

Excess Omega-3 Acids in the Body

It is very challenging to create a situation in which there is an excess of omega-3 fatty acids in the body. In principle, it may only occur in the event of gross non-compliance with the recommendations contained in the leaflet. An inappropriate ratio of omega-6 to omega-3 fatty acids is much more common.

If you have consumed too much omega-3 fatty acids, it is possible to experience diarrhea, as it is a consequence of consuming excessive amounts of fats. People taking anticoagulants should also be careful when supplementing omega-3 fatty acidsTrusted Source because these compounds in too high doses may intensify their effects.

Use caution and do not use large doses in people with hemophilia or bleeding disorders. The possibility of prolonged bleeding time should also be considered in other patients at increased risk of bleeding. For example, it may happen in the case of surgery. When high doses of omega-3 fatty acids are used in patients with coagulation disorders taking anticoagulants, coagulation parameters should be monitored, and the dosage should be adjusted if necessary.

Moreover, liver function parameters should be monitored in people with hepatic impairment taking high doses.

The Daily Dose

Specialists have not been advised for omega-3 fatty acids, except for ALA. The daily dose of omega-3 fatty acids depends on many factors, including age and gender.

Life Stage Recommended Amount of ALA
Birth to 12 months 0.5 g
Children 1–3 years0.7 g
Children 4–8 years0.9 g
Boys 9–13 years1.2 g
Girls 9–13 years1.0 g
Teen boys 14–18 years1.6 g
Teen girls 14–18 years1.1 g
Men 1.6 g
Women1.1 g
Pregnant teens and women 1.4 g
Breastfeeding teens and women1.3 g

If you don’t know what dose of omega-3 fatty acids will be best for you and wonder whether supplementation is necessary, go for a dietary consultation and talk to a dietitian about your doubts.

Safety of Taking Omega-3 Fatty Acids

According to Food and Drug Administration (FDA) experts, daily consumption of up to 3 g of omega-3 fatty acids is generally acknowledged as safe (Generally Recognized As Safe – GRAS) and is not associated with significant side effects. You also need to remember to choose oils with good-quality omega-3 acids.

The amount of EPA and DHA acids and their proportions depend, among others, on the species of fish, their physiological condition, the season in which the fish is caught, and the place of fishing.

Omega-3 acids should be obtained from small fish because they accumulate much less heavy metals due to their short lifespan than large fish. We should also choose products made from fish caught in certified water reservoirs. Recommended places for fishing are the seas of the Northern Hemisphere (especially the Arctic Ocean), where the industry is not that developed, which means smaller water pollution.

Omega-3 Fatty Acids: What Are, Health Benefits, and Daily Dose

Due to the ease with which fish oil can undergo oxidation processes that are harmful to health, the production conditions and the time from catching the fish to obtaining the oil are significant. Ideally, the time from catch to fish oil production should be less than 36 hours.

What’s more, the lighter the color of the oil, the higher the quality of the product. It means it does not become rancid and will not generate any damaging side consequences. Remember that fish oil should have a delicate, fresh scent. If it smells too strongly of fish, it may indicate rancidity and low quality of the raw material.

Omega-3 acids contained in the product should be triglycerides (TG), i.e., in the same form as in fish, so they should not be concentrated. Choosing products certified by recognized organizations that set quality assessment standards is also worth choosing.

With this in mind, it should be mentioned that the TOTOX factorTrusted Source tells you how fresh the omega-3 supplement is and how stable the fats it contains. When determining it, the number of oxidation-related by-products in the preparation is checked. TOTOX should be less than 25, but the lower this value is, the better for our health. Find information about the TOTOX index on the manufacturer’s website or on the websites of independent foundations that evaluate dietary supplements, such as IFOS (International Fish Oil Standards).

You can buy omega-3 supplements in capsule or liquid oil form. We should decide for ourselves which form will be more suitable for us. Moreover, numerous studies show that the liquid form is more susceptible to oxidation and may lose its properties faster. The conclusion is that capsules probably provide better protection for the product.

Remember that capsules with omega-3 acids may have different sizes. We also choose dark packaging products that allow as little light as possible because omega-3 acids are sensitive to oxidation under the influence of sunlight.

We would also like to point out that unpleasant belching after consuming an omega-3 supplement may indicate that the preparation is stale. However, if the products are of good quality and you still experience burping, other supplements are worth testing.


The main contraindication to using preparations with omega acids is hypersensitivity to any of their components.

Furthermore, caution should be exercised, and large doses should not be used in people with hemophilia or bleeding disorders. The possibility of prolonged bleeding time in other patients at increased risk of bleeding should also be considered. For example, this may be the case in surgical procedures. As mentioned earlier, if high doses are used in patients with coagulation disorders taking anticoagulants, coagulation parameters should be monitored, and the dosage should be adjusted if necessary.

If we suffer from liver failure, liver function parameters should be monitored when using high doses.

Sources of Omega-3 Fatty Acids in the Diet

It is worth noting that there is a difference between omega-3 fatty acids of animal origin (EPA and DHA) and those of plant origin (ALA). Marine fish are a rich source of EPA and DHA, while some plants provide ALA. The human body can convert ALA into EPA and DHA, but this process is limited, so it is recommended to consume various of sources omega-3.

To avoid omega-3 deficiency in your diet, you should permanently include appropriate products. The richest sources of DHA and EPA fatty acids are:


January 23, 2024
11 minutes read

Table of Contents

Find a topic by its first letter
Castor Oil: What Is, Nutritional Value, Benefits, Uses, and Side Effects
Castor Oil

Castor oil has many benefits. It is used as a cosmetic as well as a dietary supplement. Find out how… read more »

Folic Acid: Health Benefits, Sources, and Safety
Vitamin B9 (Folic Acid)

Folate (also reffered as vitamin B9) has many health benefits. Discover them all. Learn, why it is important to take… read more »

How to Lower Cholesterol? 15 Foods that Help Lower Cholesterol
How to Lower Cholesterol

Do you know what to put in your diet to lower your cholesterol? Learn about 15 foods that effectively affect… read more »

Honey: What Is, Nutritional Value, Health Benefits, Uses, and More

Honey not only delights with its sweet taste, but also has many health properties. Learn about the benefits of eating… read more »

Fatty Liver: What Is, Causes, Diagnosis, and Treatment
Fatty Liver

Fatty liver is a condition in which fat builds up inside the liver. It usually doesn’t cause symptoms and is… read more »

DASH Diet: What Is, Health Benefits, Guidelines, Risks, and Recipes

The DASH diet is a diet ideal for improving hypertension. In addition, it also has many other benefits. Learn about… read more »

PCOS: What Is, Symptoms, Diagnosis, and Treatment

Polycystic ovary syndrome (PCOS) manifests itself with a number of physical and psychological symptoms. It is caused by hormonal disorders. read more »

Vitamin C: Important Functions, Daily Doses, and Sources
Vitamin C

Vitamin C (ascorbic acid) is involved in processes in our bodies that provide correct functioning. Where you can find vitamin… read more »

Leukocytosis: What Is, Types, Causes, Diagnosis, and Symptoms

Leukocytosis is a condition in which the upper norm for white blood cells is exceeded. What are its symptoms and… read more »