Draft guidance for the website NHS Choices warning that there is no evidence that homeopathy works was suppressed by officials following lobbying by a charity set up by the Prince of Wales.

Homeopathy, which involves the use of remedies so heavily diluted with water that they no longer contain any active substance, is "rubbish", said chief medical officer Sally Davies in January to the House of Commons science and technology committee. She added that she was "perpetually surprised" that homeopathy was available in some places on the NHS.

But the government's NHS Choices website, which is intended to offer evidence-based information and advice to the public on treatments, does not reflect her view. A draft page that spelled out the scientific implausibility of homeopathic remedies was neutered by Department of Health officials. It is now uncritical, with just links to reports on the lack of evidence.

Lobbying by opponents, and the response from DH officials who did not want to take on Prince Charles's now defunct Foundation for Integrated Medicine and other supporters of homeopathy, is revealed in correspondence from the department discussing the new guidance. It was released under the Freedom of Information Act to Prof David Colquhoun of University College London, a Fellow of the Royal Society and prominent science blogger.