The Quest for Immortality: Science at the Frontiers of Aging

This is a book, not a single experiment or clinical trial. It reviews research on aging in humans and animals, including ideas about slowing or preventing age-related decline. It discusses possible limits on human lifespan and why results from animals may not apply to people. No new group of participants was tested, so it provides background rather than a direct treatment result.

What this means for you: Use it as a general introduction to aging research, not as evidence that a supplement, treatment, or lifestyle program can extend your life. You can ignore claims of guaranteed immortality based on this book.