Does omega-3 benefit the heart, and does everyone need fish oil?
Omega-3 fats have important functions and can come from food, but fish oil supplements are not needed by everyone and do not guarantee prevention of heart attacks or dementia. General supplements differ from prescription products used for selected conditions.
Details
Start with food
Oily fish provides long-chain omega-3s, while flaxseed and walnuts provide a plant form that the body converts only in limited amounts. These forms are not interchangeable for every outcome. Pregnancy and childhood require appropriate low-mercury fish choices.
Products are not a universal prescription
The weight of fish oil on a label is not always the amount of active omega-3 components. Do not start high doses for triglycerides without assessment or replace prescribed lipid treatment with a supplement. There is no universal dose for general “heart and brain health.”
Adverse effects and interactions
Digestive upset and unpleasant taste may occur. Review use with blood thinners. Trials of high doses have found increased atrial fibrillation in some people with cardiovascular disease or high risk. Discuss individual benefits and risks.
Related reading: Do I need a multivitamin, or is a balanced diet enough?.