For years, fats have been under fire. Too high in calories, too fatty, potentially harmful to health? Today, our understanding has evolved: certain fats are not only beneficial but essential to our health, provided they are consumed in moderation. Among them, omega-3, omega-6, and omega-9 are often mentioned, sometimes confused, and rarely well understood. This article helps you sort them out, understand their roles, and adopt the right habits to reap all their benefits.
Fats are essential for the body to function properly. They play a role in cell membrane structure, hormone regulation, brain function, and the transport of certain vitamins—provided you choose unsaturated fatty acids, which are healthier than saturated fats.
There are two main groups of unsaturated fatty acids:
They differ in their chemical structure (the number and position of double bonds between carbon atoms), which determines their function and their impact on health.
Omega-3s consist of three fatty acids:
Our bodies convert ALA into EPA and DHA, but this conversion rate is very low (less than 10%). That is why marine sources are particularly important for a direct supply of EPA and DHA.
Their roles:
Omega-3s are known for:
The most commonomega-6 fatty acid is linoleic acid (LA), which is found in many vegetable oils (sunflower, corn, and grapeseed), margarines, and processed foods.
It is converted into arachidonic acid, a fatty acid involved in the production of molecules called eicosanoids, which play a role in the body’s natural inflammatory and immune response mechanisms .
These responses are essential for the body to defend itself against infection, injury, or trauma. However, when omega-6 intake is too high and/or poorly balanced relative to omega-3 intake, this inflammatory response can become excessive or chronic, which is undesirable in the long term.
These are essential fatty acids (such as omega-3s): the body cannot produce them on its own, so they must be obtained through diet.
Omega-9 fatty acids ( primarily oleic acid) are found in olive oil, avocados, almonds, hazelnuts, and other foods…
Unlike omega-3 and omega-6 fatty acids, omega-9 fatty acids are not essential, as the body can produce them on its own.
Their benefits: they are good for the heart, help maintain healthy cholesterol levels, and are an integral part of the Mediterranean diet, which is known for its health benefits.
In theory, omega-6 and omega-3 fatty acids work together: one promotes the inflammatory response (which is beneficial in the short term), while the other helps resolve that inflammation.
But in the modern diet, omega-6 fatty acids are consumed in excess, particularly through:
The result: the omega-6 to omega-3 ratio is severely out of balance.
According to ANSES, the ideal ratio of omega-6 to omega-3 is 4 to 1. In practice, however, it is often 15 to 20 to 1 in Western countries.
An excess of omega-6 combined with a deficiency of omega-3 can :
The right balance between these two types of fatty acids is therefore essential to our overall health.
Here are a few simple steps you can take to restore a healthy balance and support your health:
Since omega-3s are the fatty acids most commonly lacking in the Western diet, it is essential to restore them to a central place on our plates. The goal is not only to consume more of them, but above all to prioritize good sources, especially those that provide EPA and DHA directly.
A few simple steps can help:
Certain situations may warrant omega-3 supplementation, including:
In any case, choose high-quality supplements that are rich in EPA and DHA, sourced from controlled sources, and are purified and stable.
In a nutshell
- Omega-3, 6, and 9 are considered healthy fats… as long as they’re consumed in the right amounts.
- Omega-3s are the nutrients most commonly lacking in our diet, which can have an impact on our overall health.
- By reducing excess omega-6 intake, incorporating more sources of omega-3, and adopting a varied diet, we can help restore balance to this essential daily nutrient intake.