We know for a fact that oxidative stress is linked to increased tumour growth.
[ https://archive.is/Gyis5 ]
Now researchers are saying not to take antioxidants!
Why? Well because cancer cells will benefit more than normal cells!
Uh… should we not eat or stop breathing because cancer cells might use oxygen and glucose better than most normal cells? Of course not.
Be wary of this type of advice that goes against all reason.
The study itself is interesting because many types of growth factors were studied for specfic effects. So have a read and make your own conclusions.
https://archive.is/DRwiZ