An international team of scientists, including researchers from Harvard University and the University of Zurich, analyzed clinical trial results 777 elderly Swiss adults to test the potential anti-aging benefits of supplements and exercise.

While there’s no perfect way to measure biological aging, the researchers used tools that help measure age-related decline in the cells and organs, including factors like brain health and heart health.

They looked at participants who underwent one of eight longevity treatments over three years, including exercising and supplementing omega-3s, vitamin D, or both.