# Fish Oil Supplements Don't Deliver on Promises
The evidence for fish oil supplements remains weak despite decades of marketing claims. Large clinical trials show that omega-3 supplements fail to prevent heart disease, stroke, or cognitive decline in most people.
A 2018 study published in the New England Journal of Medicine tracked 15,000 patients taking fish oil for five years. Researchers found no reduction in heart attacks or strokes compared to placebo. A 2019 analysis in JAMA Neurology found fish oil did not slow cognitive decline in older adults.
The original research fueling fish oil's popularity came from observational studies of people who ate fatty fish regularly. Eating fish provides benefits beyond omega-3s, including protein and micronutrients. Taking a supplement isolates one component and strips away that context.
People with documented low omega-3 levels or high triglycerides may see modest improvements from fish oil. For everyone else, the supplements spend money without delivering results.
The takeaway: eat actual fish twice weekly if you enjoy it. Skip the pills. Researchers now focus on whether fish oil helps specific populations rather than promoting it as a universal preventive.