Complementary and Integrative Therapies

Many people use complementary therapies, such as acupuncture and prayer, during or after breast cancer treatment. You may also hear the terms integrative therapies or complementary health approaches.

Complementary therapies may relieve some side effects of breast cancer treatment or the cancer itself. They may also help to improve your quality of life. However, they do not treat breast cancer.

Some complementary therapies can interfere with breast cancer treatment. To avoid problems, talk with your oncologist about possible benefits and risks before using any complementary therapy or supplement.

Below you’ll find detailed information on some popular complementary therapies and an overview of topics related to complementary therapies.

List of complementary and integrative therapies
What are complementary therapies?
Safety
Scientific evidence
Talking to your health care provider
Finding a practitioner
Clinical trials of complementary therapies

What are complementary therapies?

Complementary therapies are natural products, mind and body practices and other health approaches that may be used to [1-2]:

Reduce side effects of breast cancer treatment or the cancer itself, such as nausea, fatigue and pain
Reduce stress and anxiety
Improve quality of life

Complementary therapies do not treat breast cancer. They are not standard medical treatments, such as surgery, radiation therapy and chemotherapy.

How common is the use of complementary therapies?

One study found more than 40% of U.S. women recently diagnosed with breast cancer had used a complementary therapy in the past year [3].

Complementary therapies versus alternative therapies

Complementary therapies are different from alternative therapies.

Complementary and integrative therapies are used in addition to standard medical treatments.
Alternative therapies are used instead of standard medical treatments. Standard medical treatments have been proven to reduce the chances of dying from breast cancer. Alternative therapies are not proven treatments and are not recommended.

No complementary or alternative therapy can prevent, treat or cure cancer.

If you feel a product or therapy is making a false claim, check the Federal Trade Commission (FTC)’s Cancer Treatment Scams website for any consumer warnings. Your health care provider is also a good source for this information.

Categories of complementary therapies

Complementary therapies can be grouped into categories that may be helpful when you talk with your health care provider.

Categories of complementary therapies
Category	Description
Nutritional	Natural products, including special diets, dietary supplements, herbs, vitamins, minerals or probiotics (such as the bacteria found in yogurt)
Psychological	Practices that focus on the mind, including meditation, hypnosis, relaxation therapy and music therapy
Physical	Practices that focus on the body, including acupuncture and massage
Combinations	Therapies that combine psychological and physical practices (mind and body practices), including yoga and tai chi
Adapted from National Center for Complementary and Integrative Health materials [4].

Safety of complementary therapies

Safety can be a concern with some complementary therapies. Understanding safety issues helps you be an informed consumer.

Unlike standard medical treatments, many complementary therapies are not regulated by the federal government and may not have quality controls.

Safety of complementary therapies during breast cancer treatment

Some complementary therapies can interfere with breast cancer treatments. For example, some dietary supplements can interfere with blood clotting after surgery [14].

So, all decisions about complementary therapies should be made jointly with your oncologist.

Limited data on safety

Few complementary therapies have been studied with the same scientific rigor as standard medicine. While some are safe, others should be avoided.

Some therapies can [5-13]:

Increase surgery risks
Interfere with the effectiveness of chemotherapy and radiation therapy
Worsen treatment side effects

For example, some dietary supplements can interfere with blood clotting after surgery [14].

Talking with your health care provider before using any complementary therapy may help you avoid problems. Your provider can help you understand the risks and benefits of the therapy you are thinking about using.

The National Center for Complementary and Integrative Health (part of the National Institutes of Health) has safety information on many complementary therapies, including possible side effects and cautions of therapies. The National Institutes of Health also has a database of information on herbs and dietary supplements that can cause injury to the liver called LiverTox®.

Choosing dietary supplements

With dietary supplements, there’s no guarantee that what’s on the label is what’s inside the bottle.

Choosing supplements from known, reputable manufacturers may increase the likelihood:

The ingredient list is accurate and complete
The dose and strength are listed correctly
The supplement doesn’t contain harmful levels of pesticides, heavy metals (such as lead, arsenic or mercury) or other contaminants
The supplement was made under sanitary, well-controlled conditions

One way to check that a manufacturer follows good practices in preparing supplements is the “USP verified” stamp on the label. For more on this, or to see if a supplement has been USP verified, visit the USP website.

Your health care provider may be able to recommend a USP verified dietary supplement.

Choosing a complementary therapy practitioner

A license to practice a complementary therapy, such as acupuncture, shows a practitioner has passed the licensing requirements in their field.

However, seeing a licensed practitioner isn’t a guarantee you’ll get safe, high-quality care.

Learn more about finding a complementary therapy provider.

“Natural” vs. “safe”

“Natural” products can be appealing, but “natural” doesn’t mean “safe.” For example, poison ivy and poisonous mushrooms are natural, but they aren’t safe.

The Food and Drug Administration (FDA) has limited oversight on dietary supplements and doesn’t regulate them as strictly as medications.

If the FDA has evidence a “natural” product is harmful, it can pull the food or supplement from the market or issue a warning.

To see if any safety alerts have been issued on a product, visit the FDA website.

False claims

No complementary or alternative therapy can prevent, treat or cure cancer. If a complementary or alternative therapy makes this claim, it’s a scam.

You may see false claims on the Internet or on social media about alternative therapies being used to treat or cure breast cancer. Beware of words like “miracle cure,” “ancient remedy” or “secret ingredient” [10].

Scientific evidence on the use of complementary therapies

The quality of the scientific evidence behind complementary therapies varies. Few therapies have been studied with the same scientific rigor as standard medicine.

For some therapies, there’s good evidence on safety and effectiveness. For example, mindfulness-based therapy (such as mindfulness meditation) has been shown to be safe and can help reduce fatigue in people diagnosed with breast cancer [15].

However, for many other complementary therapies, data are limited, making it hard to draw conclusions.

The American Society of Clinical Oncology (ASCO) and the Society of Integrative Oncology (SIO) are organizations that regularly review the scientific evidence on many complementary therapies. They have guidelines on the use of complementary therapies in cancer care.

Weighing the scientific evidence

There are many ways to assess the quality of scientific evidence. Most look at:

The types of studies done
The number of studies done
The consistency of findings across studies

Together, these basic factors form the weight of evidence behind a therapy and help answer important questions about its safety and effectiveness.

Types of studies

Some types of research studies hold more weight than others when it comes to the strength of their results.

In general, randomized controlled trials are considered the best type of study for learning whether a complementary therapy is safe and effective. In randomized controlled trials, researchers randomly assign (as if by coin toss) people to groups to compare different interventions.

Say, a randomized trial is studying exercise and fatigue. Half the participants might be randomly assigned to walk 10 minutes a day and the other half to walk 2 hours a day. The researchers could then see which group was more likely to reduce fatigue (those who walked 10 minutes a day or those who walked 2 hours a day).

Other types of studies (such as cohort studies and case-control studies) can also be used to assess complementary therapies.

Study quality and study size (the number of people taking part in a study) are also important when assessing results.

The results from a small, poorly-designed randomized controlled trial may not be as strong as those from a large, well-designed cohort or case-control study.

Learn more about different types of research studies.

Learn more about study size.

Number of studies

The more studies on a complementary therapy, the more scientific evidence there is to draw conclusions about its risks and benefits.

The type, quality and size of the studies are also important. One large, well-designed randomized controlled trial can be more compelling than 20 small studies.

In general, though, the more studies there are on a therapy, the better health care providers and researchers are able to draw conclusions about its safety and effectiveness.

Learn more about study size.

Consistency of findings

Whether or not studies tend to show the same results is important in weighing the scientific evidence on a complementary therapy. Evidence is more compelling when most studies have similar results.

When some studies show a therapy is effective and other studies show it’s not effective, it’s hard to draw conclusions.

It’s similar to asking 3 friends what they thought of a movie. If all 3 liked it, you have evidence the movie was good. If one friend liked it, one didn’t and one thought it was OK, it’s hard to know what to think.

Limited data on safety

Few complementary therapies have been studied with the same scientific rigor as standard medicine. While some complementary therapies are safe, others should be avoided.

Learn more about safety and complementary therapies.

Talking to your health care provider about complementary therapies

Any decisions about complementary therapy use should be made jointly with your health care provider. Some complementary therapies can [5-13]:

Increase surgery risks
Interfere with the effectiveness of chemotherapy and radiation therapy
Worsen treatment side effects

Learn more about safety and complementary therapies.

Tips for talking with your health care provider

Be open. Share your interests, thoughts and concerns about complementary therapies with your health care provider.

Make a list. Before meeting with your health care provider, write down the things you want to discuss. (This is useful for any visit with your provider.)

Be specific about each therapy. For supplements, make a note of the name, the ingredients, the manufacturer and how much of the supplement you’re thinking about taking (or are already taking). It’s helpful to bring the supplement bottle with you, if you can.

Keep a diary of your symptoms and any side effects. When you start a complementary therapy, keep a daily diary of any relief from symptoms or new side effects.

One therapy at a time. Don’t try more than one new complementary therapy at a time. That way, if a side effect occurs, you’ll know which therapy is likely causing the problem. And, if you get relief from symptoms, you’ll know which therapy is likely helping.

Discuss your complementary therapy use at each visit. Use your symptom diary to talk about how you’ve been feeling while using the therapy.

Questions for your health care provider

The following questions may help you talk with your health care provider about complementary therapies:

How do you feel about complementary therapies?
Have you ever referred a patient to a complementary therapy practitioner?
What’s the best way to find a licensed complementary therapy practitioner?
I’m using (name complementary therapy). Should I stop it during or after my breast cancer treatment?
I would like to use (name therapy). Is there research showing it’s safe? Will it interfere with my breast cancer treatment? Does it have side effects?
Should I let you know before I start a complementary therapy? Which therapies should I avoid?
Are there clinical trials studying this complementary therapy (name therapy)?

Learn more about talking with your health care provider.

Learn more about clinical trials.

Limited data on safety

Few complementary therapies have been studied with the same scientific rigor as standard medicine. While some complementary therapies are safe, others should be avoided.

Learn more about safety and complementary therapies.

Finding a complementary therapy practitioner for a psychological, physical or combination complementary therapy

Once you’ve talked with your health care provider and decided a complementary therapy may be right for you, the next step is finding a practitioner who specializes in the therapy.

Referrals from your health care provider

The best place to start is your health care provider. Your provider may be able to refer you to a complementary therapy practitioner in your area.

Doctors, nurses and other health care providers (such as physical therapists and psychologists) can offer complementary therapies. For example, physical therapists may offer massage therapy, and nurses may use therapeutic touch.

Checking licensing status

Finding a licensed complementary therapy practitioner is a good step. While a license doesn’t guarantee safe, high-quality care, it does mean a practitioner has passed licensing requirements in the field.

The websites below can be used to check the licensing status of many complementary therapy practitioners:

National Certification Commission for Acupuncture and Oriental Medicine (NCCAOM)
http://www.nccaom.org

Federation of Chiropractic Licensing Boards
http://www.fclb.org/

American Association of Naturopathic Physicians
http://www.naturopathic.org/

National Certification Board for Therapeutic Massage and Bodywork
http://www.ncbtmb.org/

American Massage Therapy Association
http://www.amtamassage.org

Interview your potential practitioner

Before you begin a complementary therapy, have a brief meeting with the practitioner.

Discuss the practitioner’s:

Experience treating people with cancer
Qualifications
Views on using complementary therapies in addition to standard medical treatments
General approach to therapy

Discuss your:

Medical history
Current medicines and breast cancer treatments
Health care provider’s recommendations and contact information
Potential benefits and risks from the therapy
Therapy costs (only a few therapies are covered by health insurance plans)

If you aren’t comfortable with what you hear, or things don’t seem quite right, you can go somewhere else.

You don’t have to settle just because you’ve taken the time and effort to find and meet with a practitioner. Keep looking until you find one that’s right for you.

Clinical trials of complementary therapies

Taking part in a clinical trial gives you a chance to use a complementary therapy in a well-monitored setting.

It’s important to discuss joining a clinical trial with your health care provider. Your provider can discuss the benefits and any risks with you.

These websites can help you find clinical trials of complementary therapies:

Susan G. Komen^® Patient Care Center

If you or a loved one needs information or resources about clinical trials, the Patient Care Center can help. Contact the Komen Breast Care Helpline at 1-877-465-6636 or email clinicaltrialinfo@komen.org.

Se habla español.

Learn more about clinical trials.

Our commitment to research

At Susan G. Komen^®, we are committed to saving lives by meeting the most critical needs in our communities and investing in breakthrough research to prevent and cure breast cancer. Our Research Program is an essential driving force for achieving this mission.

Since our inception in 1982, Komen has provided funding to support research grants that have greatly expanded our knowledge of breast cancer and helped us understand that breast cancer is not just a single disease but many diseases, unique to each individual.

To date, Komen has provided nearly $1.1 billion to researchers in 47 states, the District of Columbia and 24 countries to support research that has resulted in:

A better understanding of breast cancer, including earlier detection
Personalized, less invasive treatments for what was once a “one-treatment-fits-all” disease
Improvements in both quality of life and survival rates

Learn more about our continuing investment in research and the exciting research that we are funding, because nothing would make us happier than ending breast cancer forever.

Complementary and integrative therapies

There are many types of complementary and integrative therapies. Some are listed below. Click on a topic to learn more. This is not an exhaustive list.

We also offer Spanish language versions of the information on these complementary and integrative therapies.

También ofrecemos versiones en español de la información sobre estas terapias complementarias e integrativas.

Updated 06/02/25

This content is regularly reviewed by an expert panel including researchers, practicing clinicians and patient advocates.

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Facts For Life: Integrative and Complementary Therapies

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Complementary and Integrative Therapies