A new study suggests that the key to living longer might already be sitting on your kitchen counter. Researchers in Switzerland have found that omega-3 supplements—already known for their brain and heart benefits—can also slow down the biological aging process in older adults, potentially reducing cancer risk and delaying physical frailty.

The findings come from a major clinical trial called DO-HEALTH, which observed 777 participants between the ages of 70 and 85 over a three-year period. The trial, which was randomized and controlled, tested the effects of three different interventions: a daily 1-gram dose of omega-3 fatty acids, a 2,000 IU dose of vitamin D, and a simple at-home strength training routine performed three times per week. Participants received different combinations of these interventions, allowing scientists to evaluate the effects of each both individually and together.

According to the study—published in the prestigious journal Nature—the group that received the omega-3 supplements saw clear benefits. On average, those taking omega-3 showed signs of a three- to four-month reduction in biological age, a 61% reduction in cancer risk, and a 39% reduction in the risk of becoming pre-frail. That “pre-frail” stage, marked by fatigue and diminished strength, is often a warning sign of more serious health problems to come.

Lead researcher Professor Heike Bischoff-Ferrari of the University of Basel emphasized the public health significance of the results. “DO-HEALTH is the largest clinical trial to date showing that we can rejuvenate biological aging in humans aged 70 and older, and this with simple strategies,” he told Fox News Digital. “As in the same trial, the interventions also reduced cancer risk and early frailty. This is relevant to public health efforts.”

While omega-3 alone showed clear benefits, the study found the effects were even more powerful when combined with vitamin D and consistent strength training. That combination produced the best outcomes for delaying biological aging and preserving quality of life.

Fox News senior medical analyst Dr. Marc Siegel applauded the results, describing the three-year impact as “significant.” He highlighted the antioxidant and anti-inflammatory effects of omega-3s, which he said likely play a role in countering diseases associated with aging—such as heart disease, high cholesterol, and certain types of cancer. “Inflammation is behind many chronic diseases that may shorten health span and lifespan,” he explained.

While omega-3s are naturally found in fatty fish like salmon, mackerel, and tuna, supplements are often used by people who don’t consume enough fish in their regular diets. The study used an algae-based version of omega-3, making it a safe and effective option for vegetarians and those with dietary restrictions. Researchers recommend speaking with a healthcare provider before starting any supplement, especially for individuals with preexisting medical conditions or who take other medications.

The implications of this research go beyond just omega-3. The study underscores a broader message: healthy aging may be within reach through relatively simple, low-cost interventions. Regular physical activity, proper nutrition, and safe supplementation can have powerful cumulative effects on health—particularly for older adults seeking to maintain independence and vitality.

Given the growing aging population across Europe and North America, strategies like these may soon become the foundation of public health policy. With costs of long-term care rising and age-related diseases increasing, even modest gains in biological healthspan could translate into significant societal savings.

For now, the findings offer a strong incentive to take a fresh look at that omega-3 bottle in your pantry. If a daily pill, combined with regular movement and basic nutrition, can add healthy months—or even years—to your life, that’s a routine worth getting behind.

As Professor Bischoff-Ferrari put it, “Simple strategies can make a tangible impact.” For aging Americans and their families, that’s not just encouraging—it’s empowering.