Kristie

NO antioxdants during radiation tratment, also not for a few weeks following it. Check with an RO.

Also read:
http://www.cancer.gov/newscenter/pressreleases/antioxidants

When you radiate with x rays you damage the cells DNA by generating free radicals (mostly from water which then damages the DNA. Antioxidants protect cells (normal and cancer cells) from damage by mopping up free radicals. So you may end up protecting the cancer cells, not a good idea.
The point is you WANT to damage the DNA, because normal cells are more efficient at repair while cancer cells are generally not.

Markus