Herbal active ingredients for life prolongation, why do these plants have a life-prolonging effect?

When researching patents in substances for life prolongation , I have come across surprisingly many medicines made from plants.
There are the classic garlic, chamomile, cabbage, ginger, onion, valerian etc.

But also "new plants" with quite amazing characteristics such as Jiagulan or Toona. Including the traditional Chinese medicine and Ayurveda, the healing herbs from Africa and South America, the spectrum of herbal active ingredients expands enormously. In combination with modern pharmacy and medicine, it has become quite possible to prolong life.