Yes. I’m pretty sure his PED taking at an early age led to him developing cancer, especially since he was taking corticosteroids. It was even in his lungs.

However, Lance didn’t really need them. I always tell people that PEDs don't give athletes skills or abilities. That is developed by the athlete. PEDs just intensifies it. This is why the majority who take PEDs don’t succeed.

Lance was already an endurance beast from being a great swimmer and a triathlete as a teenager. Other cyclists didn’t have those roots. His Oxygen capacity was already through the roof.