Integrative Care During Cancer Treatment: What to Tell Your Oncology Team
What the National Cancer Institute, NCCIH and published studies say about herbs, supplements and complementary therapies during cancer treatment, and what to tell your oncology team.
Content last updated . This page has not been medically reviewed.
Urgent first: your oncology team comes first
If you have cancer, NCCIH says you should consult your health care providers before using any complementary health approach.[1] It also says not to use unproven products or practices to replace or delay medical treatment for cancer.[1] For new or worsening symptoms during treatment, call your oncology team; in an emergency in the US, call 911. If you are having thoughts of suicide, the 988 Suicide & Crisis Lifeline is available 24/7/365.[2]
This page is information only. It gives no treatment, supplement, diet or dosing advice.
Complementary is not the same as alternative
The National Cancer Institute (NCI) defines complementary medicine as used along with standard medical treatment but not considered standard treatment by itself, and alternative medicine as used instead of standard medical treatment.[3] This page is about the first kind: care added to your cancer treatment. The second kind is covered in choosing alternative medicine instead of cancer care: what studies found.
NCCIH says no complementary health approach has been shown to prevent or cure cancer.[1] NCI adds that there are no studies proving that any special diet, food, vitamin, mineral, dietary supplement or herb can slow cancer.[3]
What published studies found about going without standard treatment
These are observational studies, which can show associations but cannot prove cause. In a US National Cancer Database study of people with curable cancers, people who chose complementary medicine had higher rates of refusing surgery, chemotherapy, radiation and hormone therapy, and poorer 5-year survival; the authors suggested the higher risk was mediated by refusal of standard treatment.[4] A second study of 281 people who used alternative medicine as their only anticancer treatment found a greater risk of death than with conventional treatment.[5] NCCIH likewise says delayed cancer treatment reduces the likelihood of a remission or cure.[1]
What has evidence for symptoms
| Use | What the source found | Strength of evidence |
|---|---|---|
| Acupuncture for aromatase inhibitor joint pain | The SIO-ASCO guideline says it should be recommended.[7] | Promising but limited (guideline rates it intermediate-level evidence) |
| Massage in palliative or hospice care | May be recommended for pain.[7] | Promising but limited |
| Hypnosis for procedural pain | May be recommended.[7] | Promising but limited |
| Other mind-body approaches and natural products for pain | Evidence is low or inconclusive.[7] | Insufficient evidence |
The guideline covered pain, not cancer itself. See integrative oncology supportive care guidelines.
What to tell your team and ask
- Tell your doctor or nurse about every supplement, even vitamins, no matter how safe you think they are.[3]
- Make a list in advance of what you take and bring it with you.[3]
- Ask: "Will this interfere with my cancer treatment?"[3]
- Ask a practitioner about training and qualifications, and whether they will work with your doctor if necessary.[3]
Licensed naturopathic physicians complete graduate-level education at an accredited school, while traditional naturopaths may be trained in non-accredited programs and cannot be licensed, according to NCCIH, and scope of practice varies by state.[8] See credentials and scope of practice and naturopathic care in cancer: supportive care versus alternative treatment.
Frequently asked questions
Can supplements be taken during chemotherapy?
Some may interfere. NCCIH says some herbs may make chemotherapy less effective and that antioxidant and vitamin effects during treatment are uncertain, so ask your oncology team first.[1]
Does any complementary therapy cure cancer?
NCCIH says no complementary health approach has been shown to prevent or cure cancer.[1]
Which complementary therapies help with symptoms?
For cancer pain, the SIO-ASCO guideline supports acupuncture for aromatase inhibitor joint pain and says massage in palliative care and hypnosis for procedural pain may be recommended.[7]
Do I have to tell my oncologist about herbal teas?
NCI says to tell your doctor about any dietary supplements, even vitamins.[3] Include teas and herbs too.
Is using alternatives alone dangerous?
Published observational studies associate it with a greater risk of death in curable cancers.[5]
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Interactions with chemotherapy, radiation and surgery
NCCIH says some complementary approaches can interfere with medical treatment for cancer, and that some herbs may make chemotherapy drugs less effective.[1] It also says the effects of vitamin and mineral supplements, including antioxidants, during cancer treatment are uncertain.[1]
One example comes from the SWOG S0221 breast cancer chemotherapy trial, where patients were asked about supplement use. Vitamin B12 use before and during chemotherapy was significantly associated with poorer disease-free survival, multivitamin use was not associated with survival outcomes, and the authors called for caution with supplements other than a multivitamin.[6] This is an association in one trial population, not proof for every person.
For surgery, see supplements before surgery. Radiation and drug-specific interactions need your oncology pharmacist; we do not list them here.
Proper evidence not found
We searched NCI, NCCIH and PubMed for trials showing that a whole-system naturopathic plan improves cancer survival. Proper evidence not found in the sources we read.
References
- Cancer and Complementary Health Approaches: What You Need To Know, NCCIH. Read 2026-10-23.
- 988 Suicide & Crisis Lifeline. Read 2026-10-23.
- Complementary and Alternative Medicine (CAM), National Cancer Institute. Read 2026-10-23.
- Johnson SB et al. Complementary Medicine, Refusal of Conventional Cancer Therapy, and Survival Among Patients With Curable Cancers. JAMA Oncol 2018 (PubMed abstract). Read 2026-10-23.
- Johnson SB et al. Use of Alternative Medicine for Cancer and Its Impact on Survival. J Natl Cancer Inst 2018 (PubMed abstract). Read 2026-10-23.
- Ambrosone CB et al. Dietary Supplement Use During Chemotherapy and Survival Outcomes of Patients With Breast Cancer Enrolled in a Cooperative Group Clinical Trial (SWOG S0221). J Clin Oncol 2020 (PubMed abstract). Read 2026-10-23.
- Mao JJ et al. Integrative Medicine for Pain Management in Oncology: Society for Integrative Oncology-ASCO Guideline. J Clin Oncol 2022 (PubMed abstract). Read 2026-10-23.
- Naturopathy, NCCIH. Read 2026-10-23.