This question is referring to the 2019 Doom Patrol series on the DC Universe streaming service but supporting material from the comics is certainly welcome.
All of the main characters have stopped aging and I don't really understand why or how. It's revealed in the final episode of Season 1 that in his search for immortality, Niles Caulder
causes all the Doom Patrol's individual accidents
but he's explained to have achieved his anti-aging from his secret lady friend. But if so, why would he continue searching?
So, my question is this: What mechanisms prevent Niles and the Doom Patrol from aging and how exactly is that process related to Niles?