The Prince's Duchy Originals produce a variety of complementary medicinal products including a "Detox Tincture" that Edzard Ernst has denounced as "financially exploiting the vulnerable" and "outright quackery". In 2009, the Advertising Standards Authority criticised an email that Duchy Originals had sent out to advertise its Echina-Relief, Hyperi-Lift and Detox Tinctures products saying that it was misleading. The Prince personally wrote at least seven letters to the Medicines and Healthcare products Regulatory Agency (MHRA) shortly before they relaxed the rules governing labelling of such herbal products, a move that has been widely condemned by scientists and medical bodies. In October 2009, it was reported that Charles had personally lobbied the Health Secretary, Andy Burnham, regarding greater provision of alternative treatments in the NHS. In 2016, Charles said in a speech that he used homeopathic veterinary medicines to reduce antibiotic use at his farm.