My mum knows a man who's having radiation to half of his face after cancer being removed and he's been taking double doses of Co enzyme Q10 and grape seed extract. He says he has very little bad side effects. Apparently it really helps your immune system.
I'm planning on dosing up my partner before he starts next week and continuing throughout.

Partner diagnosed with low grade mucoepidermoid carcinoma of sublingual gland, 2nd opinion graded intermediate grade, surgery to remove,lymph nodes removed one side, nodes all clear. Treatment - radiation.