Taking a daily omega-3 supplement for about five years may lower the chance of having a heart attack by nearly a third for people aged 50 and up who are otherwise healthy.

We analyzed the available evidence on omega-3 supplements and heart attack risk in older adults, and what we’ve found so far suggests a possible link between daily omega-3 use and a reduced chance of heart attack in people aged 50 and up who are otherwise healthy. One assertion, based on data from about five years of supplementation, indicates the risk may be lowered by nearly a third [1]. No studies in our review contradicted this finding. The evidence we’ve reviewed leans toward the idea that consistent, long-term omega-3 supplementation could play a role in supporting heart health in this group. However, we did not see data on how this effect might vary by dose, type of omega-3, or individual health factors like cholesterol levels or existing conditions. We also did not see results from randomized trials or long-term follow-ups beyond the five-year window mentioned. Because only one assertion was analyzed, and no opposing data was found, we cannot say whether this effect is strong, consistent, or applies to everyone in this age group. What we know is limited to this single claim, and while it points in one direction, more research would be needed to understand how reliably this benefit appears across different populations. We also don’t know if the benefit holds for people with existing heart disease or other risk factors — the evidence only covers those who are otherwise healthy. If you’re an older adult without major health issues and considering omega-3 supplements, this one piece of evidence suggests it might help reduce your chance of a heart attack over time. But it’s not a guarantee, and it shouldn’t replace other proven habits like staying active, eating whole foods, or managing blood pressure.