Well honestly i heard this alot, but when i ask, there is never any concrete proof about this, all of it is speculation on my part. It could very well help or you could just be having a lucky/unlucky streak.

So in the end, i havent seen any tests saying that its there for real, but nothing disproving it either. So the thing is, it never hurts to try, theres no real loss to trying thats my stance on it.