What is Omega-3? Composition, Body Functions & Overall Benefits

Many people have heard of omega-3s. These compounds can be found in a variety of foods (especially fish), and are also very popular as supplements. They’ve been shown to be beneficial in a huge number of ways, especially for the brain, immune system, and blood vessels.

Key Takeaways

Omega-3s are a group of polyunsaturated fatty acids, which are important in maintaining the fluidity of cell membranes and in promoting healthy signaling between cells.
Short-chain omega-3s like ALA dominate in most plant-based sources, while long-chain omega-3s like EPA, DHA, and DPA are usually found at higher levels in animal sources.
Omega-3 supplements have been linked to a huge number of potential benefits, including better brain function, a reduced risk of blood clots, and lower chronic inflammation.
To get the full benefits of an omega-3 supplement, it’s best to ensure that it contains balanced levels of all three of the main long-chain omega-3s. Not all omega-3 supplements have significant levels of these fatty acids.
Although these compounds are more commonly found in fish and other seafood, there are plant-based sources of EPA, DHA, and DPA. Look specifically for a supplement that states the levels of all three.