My mom passed away end of june 2007. she wasn't consistently on the vitamin c treatment. I discussed with the doctor treating her the vitamin c via through a port on her chest and he thought increasing from 50 to 100 would have been better. my mom's cancer was just too advanced and she had all these extra problems so she would go to the hospital every week. I know if I were to have cancer, I would have consistently used vitamin c. I totally believe in it.