6 doctors weighed in:
Can multivitamins increase risk of providing cancer cells with micro and macro nutrients, in large doses?
6 doctors weighed in

Dr. Devon Webster
Internal Medicine - Oncology
4 doctors agree
In brief: Unknown!
Great question! studies give conflicting results.
Some chemotherapy works by inhibiting folate (folic acid) used by cancer cells, so high doses of folate (folic acid) aren't good for cancer patients. High doses of vitamin c inhibit some cancers growing in a dish, but also inhibit chemotherapy effects in patients with cancer. I advise getting nutrients from food and avoiding any high-dose supplementation.

In brief: Unknown!
Great question! studies give conflicting results.
Some chemotherapy works by inhibiting folate (folic acid) used by cancer cells, so high doses of folate (folic acid) aren't good for cancer patients. High doses of vitamin c inhibit some cancers growing in a dish, but also inhibit chemotherapy effects in patients with cancer. I advise getting nutrients from food and avoiding any high-dose supplementation.
Dr. Devon Webster
Dr. Devon Webster
Thank
1 comment
Dr. Michael Thompson
Some vitamin studies showed no effect or even HARM -- eg vitamin E and selenium. Also, some supplements may inhibit chemotherapy (eg, green tea extract and bortezomib).
Dr. Steven Ginsberg
Internal Medicine - Hematology & Oncology
In brief: Probably not
There is no evidence to support this theory.

In brief: Probably not
There is no evidence to support this theory.
Dr. Steven Ginsberg
Dr. Steven Ginsberg
Thank
Get help from a real doctor now
Dr. Steven Seres
Board Certified, Internal Medicine
17 years in practice
497K people helped
Continue
108,000 doctors available
Read more answers from doctors