Omega-3s are found in both animal- and plant-based foods as well as dietary supplements.
They are considered “essential” because they must be obtained through the diet.
Your body can’t make omega-3 fatty acids on its own.

Ilja Enger-Tsizikov / Getty Images
As a result, some supplement products may not contain the ingredients listed on the label.
What Do Omega-3 Fatty Acids Do?
Omega-3 fatty acids have been linked to a variety of nutrition andhealth benefits.
Research shows that omega-3s may lower the risk ofheart disease, cancer,arthritis, and other chronic conditions.
Fatty fish is considered the best source of omega-3s.
For example, a healthcare provider may recommend taking an omega-3 fatty acid supplement for a specific health condition.
Omega-3 supplements have been linked to health benefits, like reduced triglycerides and RA symptom relief.
Fortunately, these are usually mild.
Possible side effects include:
To lower the risk of side effects, use omega-3 supplements only as directed.
How Much Omega-3 Do I Need?
There are no strict dosage recommendations for omega-3 fatty acid supplements.
Safety Considerations
Certain precautions should be taken before using omega-3 fatty acid supplements.
Some people may be allergic to ingredients found in omega-3 supplements.
People with a fish allergy should not use omega-3 supplements derived from marine sources.
Always check a supplement’s ingredients list for known allergens.
People with certain health conditions should check with a healthcare provider before using omega-3 fatty acid supplements.
Additionally, omega-3 fatty acids may interact with various medications, causing the medication to not work properly.
This is especially true if you have health conditions or take prescription medications.
Your body cannot make omega-3s, which means you have to get them through your diet.
Some people are recommended to take an omega-3 supplement for a health condition or other reason.
However, side effects are possible and omega-3 supplements may not be right for everyone.
Talk with a healthcare provider to learn more about omega-3 fatty acids.
National Institutes of Health - Office of Dietary Supplements.Omega-3 fatty acids - fact sheet for health professionals.
2022;11(11):e026258.
2022;14(10):e30091.
2015;2015(4):CD010015.
doi:10.1002/14651858.CD010015.pub3
MedlinePlus.Omega-3 fatty acids.
National Institutes of Health - Office of Dietary Supplements.Omega-3 fatty acids - fact sheet for consumers.
2022;27(14):4471. doi:10.3390/molecules27144471
Oklahoma State University Extension.Hemp seed oil properties.
National Center for Complementary and Integrative Health.Omega-3 supplements: in depth.