In this paradigm-shifting book from acclaimed Harvard Medical School doctor and one of TIME magazine's 100 most influential people on earth, Dr. David Sinclair reveals that everything we think we know about ageing is wrong, and shares the surprising, scientifically-proven methods that can help readers live younger, longer. For decades, the medical community has looked to a variety of reasons for why we age, and the consensus is that no one dies of old age; they die of age-related diseases.

That's because ageing is not a disease - it is inevitable. But what if everything you think you know about ageing is wrong? What if ageing is a disease? And that disease is curable.

In this book, he reveals a bold new theory of ageing, one that pinpoints a root cause of ageing that lies in an ancient genetic survival circuit.