Is it OK to take a multivitamin while on chemotherapy?

Is it OK to take a multivitamin while on chemotherapy?

It is common for cancer doctors and treatment nurses to tell you that while on chemotherapy you should not take vitamins. Other cancer centers say we do not have an answer, yet, suggesting you can avoid vitamins or take them. Obviously this is not very helpful.

Sounds ironic, as cancer treatments follow national guidelines based on high level science meaning randomized controlled trials because of: a cancer treatments high cost, reimbursement demands, and most important, the proven benefits.

Does research also exist for specific vitamins and potential drug or treatment interactions?

Overall, the answer is yes. Avoid the vitamins that are recognized to likely interfere with chemotherapy or cancer treatment drugs. Unfortunately, most cancer centers have to focus on diagnostic tests, cancer treatment choices and have not reviewed the vitamin literature in depth or believe too many questions remain. In addition, with a multivitamin you are addressing many different ingredients (vitamins). Part of the struggle for cancer centers is they often do not differentiate between blinded randomized controlled studies (phase III trials) that are considered confirmatory and observational studies. Note this recently was addressed with vitamin B12 where randomized controlled trials do exist, confirming this vitamin is likely safe in cancer patients but is confused with recently addressed observational studies that suggest otherwise. Therefore another RCT should be done, and in the works at 4CancerWellness. Currently based on blind randomized controlled studies, B12 seems safe noting it supports the wellbeing of cancer patients, diabetics, those with stomach issues including prior gastric bypass or older individuals (common with cancer).


Is it OK to take a multivitamin while on chemotherapy? Actually, likely depends. Many cancer centers and some fairly prominent universities would say, no. But when your multivitamin avoids the vitamins that would interfere with cancer drugs, taking SafeVite makes a whole lot of sense.

At 4CancerWellness our mission is supporting the wellbeing of all cancer patients during and after treatment, and thus we do recommend the daily multivitamin, SafeVite.

SafeVite: the Cancer Vitamin

This product was specifically developed to avoid vitamins that interfere with treatment but provide supportive and appropriate doses of vitamins that address the risk of nutritional needs like Vitamin B6 and Vitamin D.  Can you go back to other over the counter vitamins when not on a cancer treatment? Since we do not know when or if you will go back on a cancer treatment, and just as important, have not confirmed these vitamins we avoid prevent cancer or recurrence, 4CancerWellness feels it is best to continue with SafeVite daily. It just seems ‘safer’. Again, it is all about supporting your wellbeing whether or not you are on a cancer treatment.

In addition, SafeVite addresses other risks. We recognizes that certain vitamin levels are higher in cancer patients. Probably best to avoid those vitamins as well.

Do you need vitamins to support your wellbeing during and after cancer treatment?

Most cancer doctors, nutritionist (RD) and other health experts would say yes. Cancer patients do develop vitamin deficiencies and an appropriate dose is recommended. We also caution that more is generally not the answer. For example, high vitamin E levels can lead to liver failure, and too much B6 leads to nerve damage even though lower doses are often used to help with painful nerve damage. The later regarding helping nerve damage remains controversial.

Our mission is supporting the wellbeing of cancer patients during and after treatment. In fact our first endeavor was developing SafeVite, an all-natural, holistic, researched multivitamin, to be used in conjunction with activity and healthy nutrition for those on chemotherapy or other cancer treatments. It is truly a first of its kind vitamin.

So is it OK to take a multivitamin while on chemotherapy?

The answer is yes, if it is SafeVite.

At 4CancerWellness, we can not guarantee to prevent all cancer or recurrences, but we can and will support your wellbeing, increasing your chances if able to complete your curative cancer treatment.

SafeVite is an all-natural and holistic multivitamin that supports your wellbeing during and after cancer treatment …giving you the ability to meet this challenge and succeed.

About the Author

Dr. John Haluschak, MD

A medical oncologist who started treating cancer patients in 1991 and from his earliest days had an interest in the genetics and preventative aspects of cancer. Dr. Haluschak has been a driving force in the discovery and development of SafeVite.