Bringing supplement use into the light
Too often, providers are unaware of a patient’s supplement use.
A core reason: Dietary supplements are often touted as natural, which many patients equate with safety, said Samantha Heller, a senior clinical nutritionist at New York (N.Y.) University Langone Health.
That means patients may not know a supplement can act like a drug and interfere with their cancer treatment, and thus may not see the importance of telling their doctors.
Still, the promise of herbs, vitamins, and minerals can be alluring, and there are many reasons patients decide to partake. One major appeal: Dietary supplements can help some patients feel empowered.
“Cancer is a disease that takes away a lot of control from the individual. Taking supplements or herbs is a way to regain some sense of control,” said Dr. Mao.
The phenomenon can also be cultural, he said. Some people grow up taking herbs and supplements to stay healthy or combat health woes.
Pressure or advice from family or friends who may think they are helping a loved one with their dietary recommendations may play a role as well. Friends and family “cannot prescribe chemo, but they can buy herbs and supplements,” Dr. Mao said.
Patients seeking greater control over their health or who feel high levels of anxiety may be more likely to take suggestions from friends and family or more likely to believe false or misleading claims about the efficacy or safety of supplements, explained medical oncologist William Dahut, MD, chief scientific officer for the American Cancer Society.
Plus, social media often amplifies and normalizes this misinformation, noted Dr. Johnson. In a 2021 study published in the Journal of the National Cancer Institute, he and colleagues found that one-third of the most popular articles on cancer treatment posted to social media in 2018 and 2019 contained false, inaccurate, or misleading information that was often harmful.
Some of the false claims centered on unproven, potentially unsafe herbal remedies, according to Dr. Johnson. These included “lung cancer can be cured with cannabis oil” and “golden berries cure and prevent cancer.”
Given exaggerated claims of “cures,” some patients may keep their supplement use under the radar out of fear they will be judged or criticized.
“Clinicians should avoid making patients feel judged or telling people not to go online to do their own research,” Dr. Johnson said.
Guiding patients, instead, to accurate sources of online information may be one way to help patients feel empowered, he said. Cancer.gov and the Memorial Sloan Kettering Cancer Center’s About Herbs database provide accessible and accurate information on dietary supplements and cancer treatment for both health care professionals and patients, he noted.
If a particular supplement is not safe during treatment, providers should be able to explain why, said Ms. Cianciotta. In a recent study, 80% of health care providers surveyed believed that interactions between herbals and medications could be problematic, but only 15% could explain why.
“Being able to explain why we are discouraging a particular supplement right now tends to be much better received than just telling a patient not to take something, because it is bad,” she said.
Another key is listening closely to patients to understand why they may be taking a particular supplement. Does the patient feel out of control? Is nausea a problem?
“Allowing patients to tell you why they are using a particular supplement will often reveal unmet needs or psychosocial challenges,” Dr. Mao said. This information can allow providers to suggest an evidence-based alternative, such as mindfulness meditation or acupuncture, to manage stress.
And if a patient has received a dietary supplement from well-meaning family and friends?
“Simply telling a patient that a given supplement is useless or harmful could create family tension,” said Dr. Mao.
Instead, he recommends reframing the issue.
“We want to have a better understanding of how patients are tolerating chemo or immunotherapy before throwing other things on top of it. Let them know that now may just not be the right time to add a supplement to the mix,” Dr. Mao said.
The bottom line: “Patients want to play an active role in their own care, and we want to help them do that in a safe way,” he said.
A version of this article first appeared on WebMD.com.