Is it already possible to stop our biological aging? “It was one of the coolest experiments we‘ve ever done,” says renowned US researcher Dr. Nir Barzilai, describing his experiment. They had injected antibodies into laboratory mice. As a result, the mice showed virtually no signs of dementia, fewer cases of cancer, and fewer cardiovascular and other age-related illnesses. The researchers stopped ageing. Can we humans achieve the same? Tim Dworschak uses his 29th birthday as the occasion for a 365-day self-experiment. Through strict fasting cures and sports, he changes his entire lifestyle to slow down his measurable biological ageing. He learns from people who slow their ageing in a longevity zone. And he meets researchers in the USA who are trying to achieve a similar effect using medication. First tryoutstudies on existing drugs such as Metformin or Rapamycin are promising huge effects, at least in the labratory. What opportunities does the treatment of ageing with drugs unlock? And what are the risks involved? More than 500 tablets, a special oxygen therapy, and a sports and nutrition plan tailored to our reporter bring clarity. Tim Dworschak is one of the first people to demonstrably stop his biological ageing.