Omega-3 fatty acids are a group of essential fats that play a crucial role in human health. They are involved in numerous physiological processes, from inflammation regulation to brain and cardiovascular function. Since our bodies cannot produce these fatty acids on their own, we must obtain them through diet or supplementation. This makes an adequate intake of omega-3 fatty acids essential for maintaining good health!
What are omega-3 fatty acids and why do we need them?
Omega-3 fatty acids belong to the family of polyunsaturated fats. They have a long chain of carbon atoms with double bonds arranged in a specific structure, making them unique compared to other fats like omega-6 and omega-9. The three main forms of omega-3 fatty acids are:
- Alpha-linolenic acid (ALA): This is the plant-based form of omega-3, mainly found in seeds and nuts such as flaxseed, chia seeds, and walnuts, or in plants like perilla. ALA is a short-chain fatty acid and must be converted in the body to the other two forms—eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA)—to exert its full effects. At a young age, this conversion works naturally very well. As we age, however, the process becomes slower and less efficient. That’s why it is important to consume enough ALA-rich foods.
- Eicosapentaenoic acid (EPA) and Docosahexaenoic acid (DHA): These forms of omega-3 are primarily found in fatty fish such as salmon, mackerel, and anchovies, as well as in algae oil. EPA is mainly responsible for reducing inflammation and improving cardiovascular health, while DHA is crucial for brain function, nerve development, and maintaining healthy vision.
Can our bodies produce omega-3 fatty acids?
Omega-3 fatty acids are essential, meaning that our bodies cannot produce them on their own. Other fats, such as saturated fats or omega-9 fatty acids, can be synthesized by the body. Since omega-3s cannot be made internally, we must obtain them through food or dietary supplements. That’s why it is very important to regularly include omega-3-rich foods in your diet.
The main natural sources of omega-3 fatty acids are:
- Fish such as salmon, mackerel, anchovies, trout, and sardines, which are rich in EPA and DHA.
- Antarctic krill, which are also rich in EPA and DHA.
- Algae oil, one of the few plant-based sources of EPA and DHA and especially valuable for vegans.
- Plant-based oils such as flaxseed oil, chia seeds, and walnut oil, which are rich in ALA.
What about other omegas?
An important aspect of the balance between omega-3, omega-6, and omega-9 fatty acids is their impact on inflammation in the body. Omega-6 fats are found in vegetable oils such as corn, soybean, and sunflower oil. While omega-6 fatty acids are essential for health, they can promote inflammation when consumed in excess relative to omega-3s. The ideal omega-6 to omega-3 ratio is often estimated at 4:1 or lower, but in modern Western diets, this ratio can reach 20:1 or higher, which may contribute to chronic inflammation and diseases such as cardiovascular disease, diabetes, and autoimmune disorders.
Omega-9 fatty acids are monounsaturated fats found in oils like olive oil. They offer health benefits such as lowering bad cholesterol (LDL) and supporting healthy blood pressure and heart function, but they do not have a direct anti-inflammatory effect like omega-3s do.
What if you’re deficient in omega-3?
A deficiency in omega-3 fatty acids can cause significant health issues. These fats are essential for the structure of cell membranes and communication between our cells. Inadequate intake can lead to:
- Increased inflammation: Omega-3s play a key role in producing anti-inflammatory molecules. A deficiency can increase the risk of inflammatory conditions such as cardiovascular disease, arthritis, and autoimmune diseases.
- Brain and mental health issues: DHA is a key structural component of brain cells. A lack of DHA can lead to cognitive decline, mood disorders, and even depression. Omega-3s also help reduce symptoms of ADHD and anxiety disorders.
- Weakened immune system: Omega-3s support the immune system, and a deficiency can reduce resistance to infections.
- Increased risk of cardiovascular disease: A lack of EPA and DHA can contribute to a higher risk of heart disease by increasing inflammation, lowering good cholesterol (HDL), and promoting blood clotting.
Phytotherapy and omega-3
In phytotherapy, omega-3 fatty acids are often used for their anti-inflammatory and health-supporting properties. Nowadays, many supplements based on algae or fish oil are available to help maintain healthy omega-3 levels. There is also growing research into the role of omega-3s in treating chronic inflammation, improving cardiovascular health, and promoting healthy brain function. Particularly in the treatment of chronic inflammation—such as in rheumatoid arthritis—and in cardiovascular support, omega-3s have been the subject of groundbreaking research. In certain therapies, omega-3s can also help balance hormonal systems, support joints in inflammatory diseases like arthritis, and enhance overall mental clarity.
In summary: is a tailored diet enough, or is a supplement necessary?
Although it is possible to get enough omega-3s through a well-balanced diet, many studies show that people—especially in Western countries—do not consume sufficient amounts. This is especially true for individuals who avoid fish due to dietary preferences or allergies. For them, a plant-based omega-3 supplement is a valuable alternative.
