willow bark extend lifespan in yeast

Since aging and hair are often linked as CS point since years now, its interesting to read that:

https://raypeatforum.com/community/threads/aspirin-pro-drug-from-willow-bark-extends-yeast-lifespan-by-almost-400.10141/

they tested 10 000+ ingredients on average and maximum lifespan extension in yeast and found out willow bark 25/30% salicin was the best one with impressive score: 475 per cent and 369 per cent, respectively

salicin is closely related to aspirin.. Means the effect on inflammation (PGD2 also probably ?). However, one the mechanism I would like to understand more is why: they found an important longevity factor is increase in mitochondrial respiration and ROS production.

So we want to decrease ROS in plasma but want to increase its production ? Is not the opposite of what resveratrol etc does ?