Alternative medicine refers to any health practice or treatment used in place of conventional, evidence-based medicine. The term covers a wide range of traditions, from acupuncture and herbal remedies to homeopathy and chiropractic care. What makes something “alternative” isn’t the practice itself but how it’s used: if you take an herbal supplement instead of a prescribed medication, that’s alternative medicine. If you use it alongside your prescription, it’s technically “complementary” medicine. The use of these approaches has nearly doubled in the U.S. over the past two decades, rising from about 19% of adults in 2002 to nearly 37% in 2022.
Alternative vs. Complementary vs. Integrative
These three terms get used interchangeably, but they describe different things. Alternative medicine means using a non-mainstream approach instead of conventional treatment. A person who treats their depression with St. John’s wort rather than a prescribed antidepressant is using alternative medicine. Complementary medicine means using that same herb alongside the antidepressant, as an add-on rather than a replacement.
Integrative health is a newer framework that tries to coordinate both approaches under one roof. Rather than a patient quietly taking supplements without telling their doctor, integrative health brings conventional treatments (medication, physical therapy, psychotherapy) together with complementary practices (acupuncture, yoga, probiotics) in a deliberate, organized way. The focus is on treating the whole person rather than a single organ system or disease.
Major Types of Alternative Medicine
Alternative medicine isn’t one system. It spans dozens of practices across several broad categories.
Traditional Chinese Medicine
Traditional Chinese Medicine (TCM) is one of the oldest continuously practiced medical systems, built on the concept of qi, a vital energy that flows through the body. Health, in TCM, depends on keeping qi balanced and flowing freely. The system also relies on the concept of yin and yang, opposing forces (cold and hot, passive and active, interior and exterior) that need to stay in equilibrium. When they don’t, illness follows.
The two most widely known TCM practices are acupuncture, which involves inserting thin needles at specific points on the body, and Chinese herbal medicine, which classifies herbs and foods by their thermal nature, flavor, and effects on particular organ systems. Other modalities include tai chi and qigong, both movement-based practices designed to promote the flow of qi.
Ayurvedic Medicine
Ayurveda originated in India and is built around three governing forces called doshas: Vata, Pitta, and Kapha. Each person has a unique balance of these three, and that balance determines their temperament, physical build, and susceptibility to certain illnesses. Vata governs movement, including blood circulation, breathing, and nerve signals. Pitta handles digestion, metabolism, and body temperature. Kapha provides structure, lubrication for joints, and immune strength.
In Ayurvedic thinking, disease happens when the doshas fall out of equilibrium due to diet, stress, seasonal changes, or other factors. Treatment aims to restore balance through herbal preparations, dietary changes, massage, and cleansing practices.
Homeopathy
Homeopathy operates on the principle of “like cures like,” the idea that a substance causing certain symptoms in a healthy person can, in highly diluted form, cure those same symptoms in a sick person. Remedies are prepared through a process of serial dilution and vigorous shaking. Many homeopathic products are diluted to the point where little or none of the original substance remains, which is a central point of criticism from the scientific community. Major medical organizations in several countries have concluded that homeopathic remedies perform no better than placebos in rigorous clinical trials.
Other Common Practices
Chiropractic care focuses on spinal manipulation to address musculoskeletal problems, particularly back and neck pain. Naturopathy combines dietary counseling, herbal medicine, and lifestyle changes with a philosophy of supporting the body’s own healing capacity. Mind-body practices like meditation, yoga, and guided imagery aim to use mental focus to influence physical health. Energy therapies such as Reiki claim to channel healing energy through a practitioner’s hands, though scientific evidence for these approaches remains limited.
How It’s Regulated
One of the biggest differences between alternative and conventional medicine is regulatory oversight. Prescription drugs must be proven safe and effective through clinical trials before reaching the market. Dietary supplements, including herbal products, operate under completely different rules. Under the 1994 Dietary Supplement Health and Education Act, the FDA bears the burden of proving a supplement is harmful, rather than requiring the manufacturer to prove it’s safe. This means products can reach store shelves without the kind of testing required for pharmaceuticals.
Practitioner licensing varies widely. At least 23 states and Washington, D.C. regulate naturopathic doctors, who complete a four-year graduate program. But the scope of what they’re allowed to do differs dramatically from state to state. In Colorado, naturopathic doctors must obtain a signed statement from patients confirming the patient understands they are not a medical doctor. In Alaska, naturopaths cannot use the word “physician” in their title at all. Chiropractors are licensed in all 50 states but are limited to musculoskeletal treatments. Acupuncturists have their own separate licensing requirements that also vary by state.
Spending on Alternative Approaches
Americans spend significant money on these practices. A national survey found that U.S. adults and children spent $30.2 billion out of pocket on complementary health approaches in a single year. That figure represents 9.2% of all out-of-pocket health spending. About $14.7 billion went to visits with practitioners like chiropractors, acupuncturists, and massage therapists. Another $12.8 billion went to natural product supplements, with the average supplement user spending about $368 per year. An additional $2.7 billion went to self-care materials like books and instructional programs.
Safety Risks to Know About
“Natural” does not mean safe, and herbal products can interact with prescription medications in serious ways. St. John’s wort, one of the most popular herbal supplements for mood, is a textbook example. It speeds up the body’s breakdown of many drugs, effectively making them weaker.
The consequences can be severe. Transplant patients on immunosuppressant medications have experienced dangerously low drug levels and even organ rejection after taking St. John’s wort. Women on oral contraceptives have experienced breakthrough bleeding and at least one documented unintended pregnancy. People on blood thinners have seen their medication become less effective, raising the risk of clots. The herb also reduces blood levels of cholesterol medications, blood pressure drugs, HIV antiretroviral drugs, and certain chemotherapy agents. In one study, plasma levels of an HIV medication dropped by 57% in volunteers taking St. John’s wort.
St. John’s wort is just one herb with well-documented interactions. Many other supplements have not been studied as thoroughly, meaning their interactions simply aren’t known yet. If you take any prescription medication, telling your doctor about every supplement you use is essential for avoiding potentially dangerous combinations.
What the Evidence Supports
The evidence behind alternative practices varies enormously depending on the specific treatment and condition. Acupuncture has reasonable evidence supporting its use for chronic pain, particularly low back pain, neck pain, and osteoarthritis. Yoga and meditation have solid research behind them for stress reduction, anxiety, and certain types of chronic pain. Chiropractic spinal manipulation has shown benefit for acute low back pain.
Other practices have much weaker or nonexistent evidence. Energy therapies like Reiki and therapeutic touch lack consistent support in clinical trials. Many herbal products have preliminary evidence from small studies but haven’t been tested in the large, rigorous trials required for conventional drugs. And some practices, like homeopathy, have been tested extensively and consistently fail to outperform placebos.
The quality of evidence matters because the stakes can be high. Using yoga for stress is low-risk. Replacing chemotherapy with an unproven herbal protocol is a fundamentally different decision. The risk of any alternative approach depends not just on whether it works, but on what you’re choosing not to do instead.