Hong Kong (CNN)Herbs to increase breast milk supply and heal the spleen. Traditional remedies which promise to cure insomnia and acne. Secret cancer treatments that have been ignored or suppressed by Western medicine.
Some European doctors think Chinese medicine should come with a health warning
Practitioners of Traditional Chinese Medicine (TCM) have a long history of making outsized claims, not least in the case of fertility and virility, where demand for tiger penis and rhino horn has devastated wild populations.
Quackery and false claims exist in all branches of medicine, but doctors in Europe are concerned that unverified claims made under the guise of TCM are being spread worldwide by social media, inadvertently aided by the World Health Organization (WHO).
Two leading European scientific and medical bodies say the WHO has legitimized all forms of Traditional Chinese Medicine by including TCM in the upcoming edition of the International Statistical Classification of Diseases and Related Health Problems (ICD), a hugely influential compendium used by health practitioners around the globe.
The inclusion of TCM "may lead some to see it as a legitimization of what are actually unfounded claims," warned the European Academies' Science Advisory Council (EASAC) and the Federation of European Academies of Medicine (FEAM) in a joint statement this month.
"There is risk in misleading patients and doctors and in increasing pressures for reimbursement by public health systems at a time of limited resources," the statement said.
More broadly, there is growing concern that people who turn to the internet for home remedies could expose themselves to serious harm. For example, black salve, which claims to treat tumors but actually burns flesh and can leave people with horrific disfigurements.
"Social media now makes it very easy to get hold of (misleading information)," said George Griffin, a professor of Infectious Diseases and Medicine at St. George's, University of London. "Unscrupulous people who wish to sell these products can easily put things on social media without any formal verification."
One of the basic principles of Traditional Chinese Medicine, as it is usually defined, is that vital energy, or qi, circulates through channels in the body which connect to various organs and functions. TCM therapies, such as cupping, acupuncture or herbal treatments, seek to activate these channels, or balance someone's qi.
Though the methods have been in use for hundreds of years, critics argue that there is no verifiable scientific evidence that qi actually exists.
While the TCM industry is worth an estimated $130 billion in China alone -- and the country's leaders have thrown themselves behind promoting the practice -- it has until recently largely struggled to gain widespread acceptance outside of east Asia.
The sheer range of claimed benefits of some forms of TCM can be staggering. In a review of acupuncture alone, the Society for Science-Based Medicine, a US-based pressure group, found practitioners offering treatments for everything from cancer, stroke, Parkinson's, and heart disease, to asthma and autism.
In 2009, researchers at the University of Maryland surveyed 70 systematic reviews of traditional medicines, including acupuncture, herbal treatments and moxibustion, the burning of herbs near the skin. They found that no studies demonstrated a solid conclusion in favor of TCM due to the sparsity of evidence or the poor methodology of the research.
This lack of scientific rigor has created space for often outlandish claims about TCM's capabilities in treating certain disorders -- something boosted by the handful of TCM-related treatments which have been scientifically proven to be beneficial. In 2015, Chinese scientist Tu Youyou won the Nobel Prize in medicine for her work on malaria which drew on traditional practices and folklore.
Other products derived from herbs used in TCM have also shown benefits in scientifically-controlled experiments, vindic