What is homeopathy?
Homeopathy is a system of alternative medicine developed in Germany more than two hundred years ago. It rests on two central, unconventional ideas, and it remains widely used and widely debated. Here is what it actually involves, and what the evidence says.
Two founding ideas
Homeopathy is built on two principles set out by its founder, Samuel Hahnemann. The first is "like cures like," the idea that a substance which causes symptoms in a healthy person can, in a highly diluted form, treat similar symptoms in someone who is unwell. The second is the "law of minimum dose," the idea that lower doses are more potent, achieved through a process of repeated dilution and vigorous shaking called succussion.
Homeopathic products can be derived from plants, minerals, or animal substances. They are usually prepared as small sugar pellets, though drops, creams, and tablets also exist. Because homeopathy uses its own diagnostic framework, two people with the same conventional diagnosis might be given different remedies based on their individual pattern of symptoms.
How a remedy is chosen
A homeopathic practitioner typically takes a detailed history covering physical symptoms, temperament, sleep, and lifestyle, then matches this picture to a remedy from a homeopathic reference text. This individualised approach is central to the practice, and it is one reason homeopathic trials are difficult to design in the same way as trials of a single standardised drug.
What the evidence says
This is the part where honesty matters most. A comprehensive 2015 assessment by Australia's National Health and Medical Research Council (NHMRC) reviewed 57 systematic reviews covering 176 individual studies and concluded there is no reliable evidence that homeopathy is effective for treating any health condition. The U.S. National Center for Complementary and Integrative Health (NCCIH) summarises the position similarly: there is little evidence to support homeopathy as an effective treatment for any specific condition, and the effects reported in trials are generally consistent with placebo.
Homeopathy is not a substitute for evidence-based medical care, and it should never be used in place of treatment for a serious or worsening condition, or instead of recommended immunisations.
Where it fits
Many people who use homeopathy do so alongside conventional care, for mild or self-limiting complaints, and value the time and attention a consultation offers. Understanding what it can and cannot do is the starting point for using it, or deciding not to, with your eyes open. You can read more about how remedies are made, what a consultation involves, and a fuller look at the evidence.
Common questions
Is homeopathy the same as herbal medicine?
No. Herbal medicine uses measurable amounts of plant material believed to have direct pharmacological effects. Homeopathy uses substances diluted so many times that little or none of the original material typically remains, based on a different theoretical framework. See our page on herbal remedies and supplements.
Does homeopathy work?
High-quality systematic reviews, including the 2015 NHMRC assessment, have found no reliable evidence that homeopathy is effective for treating any specific health condition, and that its effects are consistent with placebo.
Are homeopathic remedies regulated?
Regulation varies by country. In some places homeopathic products are sold as over-the-counter items with limited pre-market efficacy review, which is different from how conventional medicines are regulated. Always check the label and speak to a pharmacist or doctor if you are unsure.
Is homeopathy safe?
Highly diluted preparations are generally considered low risk in themselves, but products labelled as homeopathic can sometimes contain measurable amounts of active ingredients, and relying on homeopathy instead of effective treatment for a serious condition can cause harm through delay.
In short
Homeopathy is a long-established, individualised practice built on principles that sit outside conventional pharmacology, and the best available evidence does not support it as an effective treatment for disease. It can still hold personal value for some people as part of a broader, honestly informed approach to their health, alongside, not instead of, proven care.